diff --git a/src/components/forms/validator.ts b/src/components/forms/validator.ts
index fa601221..90ac6cde 100644
--- a/src/components/forms/validator.ts
+++ b/src/components/forms/validator.ts
@@ -4,6 +4,7 @@ import { sameAddress } from 'src/logic/wallets/ethAddresses'
 import { getWeb3 } from 'src/logic/wallets/getWeb3'
 import { isFeatureEnabled } from 'src/config'
 import { FEATURES } from 'src/config/networks/network.d'
+import { isValidAddress } from 'src/utils/isValidAddress'
 
 type ValidatorReturnType = string | undefined
 export type GenericValidatorType = (...args: unknown[]) => ValidatorReturnType
@@ -73,9 +74,7 @@ export const mustBeHexData = (data: string): ValidatorReturnType => {
 export const mustBeAddressHash = memoize(
   (address: string): ValidatorReturnType => {
     const errorMessage = 'Must be a valid address'
-    const startsWith0x = address?.startsWith('0x')
-    const isAddress = getWeb3().utils.isAddress(address)
-    return startsWith0x && isAddress ? undefined : errorMessage
+    return isValidAddress(address) ? undefined : errorMessage
   },
 )
 
diff --git a/src/logic/addressBook/store/reducer/index.ts b/src/logic/addressBook/store/reducer/index.ts
index 8e7590d7..759b8a19 100644
--- a/src/logic/addressBook/store/reducer/index.ts
+++ b/src/logic/addressBook/store/reducer/index.ts
@@ -4,7 +4,6 @@ import { AddressBookEntry, AddressBookState } from 'src/logic/addressBook/model/
 import { ADDRESS_BOOK_ACTIONS } from 'src/logic/addressBook/store/actions'
 import { getEntryIndex, isValidAddressBookName } from 'src/logic/addressBook/utils'
 import { AppReduxState } from 'src/store'
-import { checksumAddress } from 'src/utils/checksumAddress'
 
 export const ADDRESS_BOOK_REDUCER_ID = 'addressBook'
 
@@ -14,16 +13,13 @@ export default handleActions<AppReduxState['addressBook'], Payloads>(
   {
     [ADDRESS_BOOK_ACTIONS.ADD_OR_UPDATE]: (state, action: Action<AddressBookEntry>) => {
       const newState = [...state]
-      const { address, ...rest } = action.payload
+      const addressBookEntry = action.payload
 
-      if (!isValidAddressBookName(rest.name)) {
+      if (!isValidAddressBookName(addressBookEntry.name)) {
         // prevent adding an invalid name
         return newState
       }
 
-      // always checksum the address before storing it
-      const addressBookEntry = { address: checksumAddress(address), ...rest }
-
       const entryIndex = getEntryIndex(newState, addressBookEntry)
 
       // update
@@ -56,18 +52,14 @@ export default handleActions<AppReduxState['addressBook'], Payloads>(
         // exclude those entries with invalid name
         .filter(({ name }) => isValidAddressBookName(name))
         .forEach((addressBookEntry) => {
-          const { address, ...rest } = addressBookEntry
-
-          // always checksum the address before storing it
-          const newAddressBookEntry = { address: checksumAddress(address), ...rest }
-          const entryIndex = getEntryIndex(newState, newAddressBookEntry)
+          const entryIndex = getEntryIndex(newState, addressBookEntry)
 
           if (entryIndex >= 0) {
             // update
-            newState[entryIndex] = newAddressBookEntry
+            newState[entryIndex] = addressBookEntry
           } else {
             // add
-            newState.push(newAddressBookEntry)
+            newState.push(addressBookEntry)
           }
         })
 
diff --git a/src/routes/load/container/Load.tsx b/src/routes/load/container/Load.tsx
index 96044d5e..1d415754 100644
--- a/src/routes/load/container/Load.tsx
+++ b/src/routes/load/container/Load.tsx
@@ -15,6 +15,7 @@ import { buildSafe } from 'src/logic/safe/store/actions/fetchSafe'
 import { history } from 'src/store'
 import { SafeRecordProps } from 'src/logic/safe/store/models/safe'
 import { checksumAddress } from 'src/utils/checksumAddress'
+import { isValidAddress } from 'src/utils/isValidAddress'
 import { networkSelector, providerNameSelector, userAccountSelector } from 'src/logic/wallets/store/selectors'
 import { addOrUpdateSafe } from 'src/logic/safe/store/actions/addOrUpdateSafe'
 
@@ -59,7 +60,7 @@ const Load = (): ReactElement => {
   const onLoadSafeSubmit = async (values: LoadFormValues) => {
     let safeAddress = values[FIELD_LOAD_ADDRESS]
 
-    if (!safeAddress) {
+    if (!isValidAddress(safeAddress)) {
       console.error('failed to add Safe address', JSON.stringify(values))
       return
     }
diff --git a/src/routes/open/container/Open.tsx b/src/routes/open/container/Open.tsx
index eac4a9be..771cf1f0 100644
--- a/src/routes/open/container/Open.tsx
+++ b/src/routes/open/container/Open.tsx
@@ -164,7 +164,7 @@ const Open = (): ReactElement => {
     setShowProgress(true)
   }
 
-  const onSafeCreated = async (safeAddress): Promise<void> => {
+  const onSafeCreated = async (safeAddress: string): Promise<void> => {
     const pendingCreation = await loadFromStorage<LoadedSafeType>(SAFE_PENDING_CREATION_STORAGE_KEY)
 
     let name = ''
diff --git a/src/routes/safe/components/AddressBook/ImportEntryModal/index.tsx b/src/routes/safe/components/AddressBook/ImportEntryModal/index.tsx
index 4aedb6b2..98b0870a 100644
--- a/src/routes/safe/components/AddressBook/ImportEntryModal/index.tsx
+++ b/src/routes/safe/components/AddressBook/ImportEntryModal/index.tsx
@@ -6,6 +6,7 @@ import { Modal } from 'src/components/Modal'
 import { CSVReader } from 'react-papaparse'
 import { AddressBookEntry } from 'src/logic/addressBook/model/addressBook'
 import { getWeb3 } from 'src/logic/wallets/getWeb3'
+import { checksumAddress } from 'src/utils/checksumAddress'
 
 const ImportContainer = styled.div`
   flex-direction: column;
@@ -68,8 +69,8 @@ const ImportEntryModal = ({ importEntryModalHandler, isOpen, onClose }) => {
     }
 
     const formatedList = slicedData.map((entry) => {
-      const address = entry.data[0].toLowerCase()
-      return { address: getWeb3().utils.toChecksumAddress(address), name: entry.data[1] }
+      const address = entry.data[0]
+      return { address: checksumAddress(address), name: entry.data[1] }
     })
     setEntryList(formatedList)
     setImportError('')
diff --git a/src/routes/safe/components/AddressBook/index.tsx b/src/routes/safe/components/AddressBook/index.tsx
index e259c4cc..1f90ab92 100644
--- a/src/routes/safe/components/AddressBook/index.tsx
+++ b/src/routes/safe/components/AddressBook/index.tsx
@@ -126,7 +126,7 @@ const AddressBookTable = (): ReactElement => {
     // close the modal
     setEditCreateEntryModalOpen(false)
     // update the store
-    dispatch(addressBookAddOrUpdate(makeAddressBookEntry(entry)))
+    dispatch(addressBookAddOrUpdate(makeAddressBookEntry({ ...entry, address: checksumAddress(entry.address) })))
   }
 
   const editEntryModalHandler = (entry: AddressBookEntry) => {
@@ -135,7 +135,7 @@ const AddressBookTable = (): ReactElement => {
     // close the modal
     setEditCreateEntryModalOpen(false)
     // update the store
-    dispatch(addressBookAddOrUpdate(makeAddressBookEntry(entry)))
+    dispatch(addressBookAddOrUpdate(makeAddressBookEntry({ ...entry, address: checksumAddress(entry.address) })))
   }
 
   const deleteEntryModalHandler = () => {
@@ -149,11 +149,7 @@ const AddressBookTable = (): ReactElement => {
 
   const importEntryModalHandler = (addressList: AddressBookEntry[]) => {
     addressList.forEach((entry) => {
-      const checksumEntries = {
-        ...entry,
-        address: checksumAddress(entry.address),
-      }
-      dispatch(addressBookAddOrUpdate(makeAddressBookEntry(checksumEntries)))
+      dispatch(addressBookAddOrUpdate(makeAddressBookEntry(entry)))
     })
     setImportEntryModalOpen(false)
   }
diff --git a/src/routes/safe/components/Settings/ManageOwners/EditOwnerModal/index.tsx b/src/routes/safe/components/Settings/ManageOwners/EditOwnerModal/index.tsx
index 01f79dc0..a423e420 100644
--- a/src/routes/safe/components/Settings/ManageOwners/EditOwnerModal/index.tsx
+++ b/src/routes/safe/components/Settings/ManageOwners/EditOwnerModal/index.tsx
@@ -16,6 +16,7 @@ import { makeAddressBookEntry } from 'src/logic/addressBook/model/addressBook'
 import { addressBookAddOrUpdate } from 'src/logic/addressBook/store/actions'
 import { NOTIFICATIONS } from 'src/logic/notifications'
 import enqueueSnackbar from 'src/logic/notifications/store/actions/enqueueSnackbar'
+import { OwnerData } from 'src/routes/safe/components/Settings/ManageOwners/dataFetcher'
 
 import { useStyles } from './style'
 import { getExplorerInfo } from 'src/config'
@@ -27,18 +28,17 @@ export const SAVE_OWNER_CHANGES_BTN_TEST_ID = 'save-owner-changes-btn'
 type OwnProps = {
   isOpen: boolean
   onClose: () => void
-  ownerAddress: string
-  selectedOwnerName: string
+  owner: OwnerData
 }
 
-export const EditOwnerModal = ({ isOpen, onClose, ownerAddress, selectedOwnerName }: OwnProps): React.ReactElement => {
+export const EditOwnerModal = ({ isOpen, onClose, owner }: OwnProps): React.ReactElement => {
   const classes = useStyles()
   const dispatch = useDispatch()
 
   const handleSubmit = ({ ownerName }: { ownerName: string }): void => {
     // Update the value only if the ownerName really changed
-    if (ownerName !== selectedOwnerName) {
-      dispatch(addressBookAddOrUpdate(makeAddressBookEntry({ address: ownerAddress, name: ownerName })))
+    if (ownerName !== owner.name) {
+      dispatch(addressBookAddOrUpdate(makeAddressBookEntry({ address: owner.address, name: ownerName })))
       dispatch(enqueueSnackbar(NOTIFICATIONS.OWNER_NAME_CHANGE_EXECUTED_MSG))
     }
     onClose()
@@ -70,7 +70,7 @@ export const EditOwnerModal = ({ isOpen, onClose, ownerAddress, selectedOwnerNam
                 <Row margin="md">
                   <Field
                     component={TextField}
-                    initialValue={selectedOwnerName}
+                    initialValue={owner.name}
                     name="ownerName"
                     placeholder="Owner name*"
                     testId={RENAME_OWNER_INPUT_TEST_ID}
@@ -82,10 +82,10 @@ export const EditOwnerModal = ({ isOpen, onClose, ownerAddress, selectedOwnerNam
                 <Row>
                   <Block justify="center">
                     <EthHashInfo
-                      hash={ownerAddress}
+                      hash={owner.address}
                       showCopyBtn
                       showAvatar
-                      explorerUrl={getExplorerInfo(ownerAddress)}
+                      explorerUrl={getExplorerInfo(owner.address)}
                     />
                   </Block>
                 </Row>
diff --git a/src/routes/safe/components/Settings/ManageOwners/RemoveOwnerModal/index.tsx b/src/routes/safe/components/Settings/ManageOwners/RemoveOwnerModal/index.tsx
index acbe2d75..ce215102 100644
--- a/src/routes/safe/components/Settings/ManageOwners/RemoveOwnerModal/index.tsx
+++ b/src/routes/safe/components/Settings/ManageOwners/RemoveOwnerModal/index.tsx
@@ -1,5 +1,6 @@
 import React, { useEffect, useState } from 'react'
 import { useDispatch, useSelector } from 'react-redux'
+import { OwnerData } from 'src/routes/safe/components/Settings/ManageOwners/dataFetcher'
 
 import { CheckOwner } from './screens/CheckOwner'
 import { ReviewRemoveOwnerModal } from './screens/Review'
@@ -13,9 +14,7 @@ import { safeParamAddressFromStateSelector } from 'src/logic/safe/store/selector
 import { Dispatch } from 'src/logic/safe/store/actions/types.d'
 import { TxParameters } from 'src/routes/safe/container/hooks/useTransactionParameters'
 
-type OwnerValues = {
-  ownerAddress: string
-  ownerName: string
+type OwnerValues = OwnerData & {
   threshold: string
 }
 
@@ -52,18 +51,12 @@ export const sendRemoveOwner = async (
 type RemoveOwnerProps = {
   isOpen: boolean
   onClose: () => void
-  ownerAddress: string
-  ownerName: string
+  owner: OwnerData
 }
 
-export const RemoveOwnerModal = ({
-  isOpen,
-  onClose,
-  ownerAddress,
-  ownerName,
-}: RemoveOwnerProps): React.ReactElement => {
+export const RemoveOwnerModal = ({ isOpen, onClose, owner }: RemoveOwnerProps): React.ReactElement => {
   const [activeScreen, setActiveScreen] = useState('checkOwner')
-  const [values, setValues] = useState<OwnerValues>({ ownerAddress, ownerName, threshold: '' })
+  const [values, setValues] = useState<OwnerValues>({ ...owner, threshold: '' })
   const dispatch = useDispatch()
   const safeAddress = useSelector(safeParamAddressFromStateSelector)
 
@@ -94,7 +87,7 @@ export const RemoveOwnerModal = ({
 
   const onRemoveOwner = (txParameters: TxParameters) => {
     onClose()
-    sendRemoveOwner(values, safeAddress, ownerAddress, ownerName, dispatch, txParameters)
+    sendRemoveOwner(values, safeAddress, owner.address, owner.name, dispatch, txParameters)
   }
 
   return (
@@ -106,9 +99,7 @@ export const RemoveOwnerModal = ({
       title="Remove owner from Safe"
     >
       <>
-        {activeScreen === 'checkOwner' && (
-          <CheckOwner onClose={onClose} onSubmit={ownerSubmitted} ownerAddress={ownerAddress} ownerName={ownerName} />
-        )}
+        {activeScreen === 'checkOwner' && <CheckOwner onClose={onClose} onSubmit={ownerSubmitted} owner={owner} />}
         {activeScreen === 'selectThreshold' && (
           <ThresholdForm
             onClickBack={onClickBack}
@@ -122,8 +113,7 @@ export const RemoveOwnerModal = ({
             onClickBack={onClickBack}
             onClose={onClose}
             onSubmit={onRemoveOwner}
-            ownerAddress={ownerAddress}
-            ownerName={ownerName}
+            owner={owner}
             threshold={Number(values.threshold)}
           />
         )}
diff --git a/src/routes/safe/components/Settings/ManageOwners/RemoveOwnerModal/screens/CheckOwner/index.tsx b/src/routes/safe/components/Settings/ManageOwners/RemoveOwnerModal/screens/CheckOwner/index.tsx
index 8ade7e58..6feaf2ea 100644
--- a/src/routes/safe/components/Settings/ManageOwners/RemoveOwnerModal/screens/CheckOwner/index.tsx
+++ b/src/routes/safe/components/Settings/ManageOwners/RemoveOwnerModal/screens/CheckOwner/index.tsx
@@ -7,6 +7,7 @@ import Col from 'src/components/layout/Col'
 import Hairline from 'src/components/layout/Hairline'
 import Paragraph from 'src/components/layout/Paragraph'
 import Row from 'src/components/layout/Row'
+import { OwnerData } from 'src/routes/safe/components/Settings/ManageOwners/dataFetcher'
 
 import { useStyles } from './style'
 import { EthHashInfo } from '@gnosis.pm/safe-react-components'
@@ -18,11 +19,10 @@ export const REMOVE_OWNER_MODAL_NEXT_BTN_TEST_ID = 'remove-owner-next-btn'
 interface CheckOwnerProps {
   onClose: () => void
   onSubmit: () => void
-  ownerAddress: string
-  ownerName: string
+  owner: OwnerData
 }
 
-export const CheckOwner = ({ onClose, onSubmit, ownerAddress, ownerName }: CheckOwnerProps): ReactElement => {
+export const CheckOwner = ({ onClose, onSubmit, owner }: CheckOwnerProps): ReactElement => {
   const classes = useStyles()
 
   return (
@@ -44,11 +44,11 @@ export const CheckOwner = ({ onClose, onSubmit, ownerAddress, ownerName }: Check
         <Row>
           <Col align="center" xs={12}>
             <EthHashInfo
-              hash={ownerAddress}
-              name={ownerName}
+              hash={owner.address}
+              name={owner.name}
               showCopyBtn
               showAvatar
-              explorerUrl={getExplorerInfo(ownerAddress)}
+              explorerUrl={getExplorerInfo(owner.address)}
             />
           </Col>
         </Row>
diff --git a/src/routes/safe/components/Settings/ManageOwners/RemoveOwnerModal/screens/Review/index.tsx b/src/routes/safe/components/Settings/ManageOwners/RemoveOwnerModal/screens/Review/index.tsx
index d2839495..067c54f9 100644
--- a/src/routes/safe/components/Settings/ManageOwners/RemoveOwnerModal/screens/Review/index.tsx
+++ b/src/routes/safe/components/Settings/ManageOwners/RemoveOwnerModal/screens/Review/index.tsx
@@ -19,6 +19,7 @@ import { useSafeName } from 'src/logic/addressBook/hooks/useSafeName'
 import { TxParametersDetail } from 'src/routes/safe/components/Transactions/helpers/TxParametersDetail'
 import { EstimationStatus, useEstimateTransactionGas } from 'src/logic/hooks/useEstimateTransactionGas'
 import { TxParameters } from 'src/routes/safe/container/hooks/useTransactionParameters'
+import { OwnerData } from 'src/routes/safe/components/Settings/ManageOwners/dataFetcher'
 
 import { useStyles } from './style'
 import { Modal } from 'src/components/Modal'
@@ -35,8 +36,7 @@ type ReviewRemoveOwnerProps = {
   onClickBack: () => void
   onClose: () => void
   onSubmit: (txParameters: TxParameters) => void
-  ownerAddress: string
-  ownerName: string
+  owner: OwnerData
   threshold?: number
 }
 
@@ -44,8 +44,7 @@ export const ReviewRemoveOwnerModal = ({
   onClickBack,
   onClose,
   onSubmit,
-  ownerAddress,
-  ownerName,
+  owner,
   threshold = 1,
 }: ReviewRemoveOwnerProps): React.ReactElement => {
   const classes = useStyles()
@@ -91,9 +90,9 @@ export const ReviewRemoveOwnerModal = ({
         //  the data lookup can be removed from here
         const gnosisSafe = getGnosisSafeInstanceAt(safeAddress)
         const safeOwners = await gnosisSafe.methods.getOwners().call()
-        const index = safeOwners.findIndex((owner) => sameAddress(owner, ownerAddress))
+        const index = safeOwners.findIndex((ownerAddress) => sameAddress(ownerAddress, owner.address))
         const prevAddress = index === 0 ? SENTINEL_ADDRESS : safeOwners[index - 1]
-        const txData = gnosisSafe.methods.removeOwner(prevAddress, ownerAddress, threshold).encodeABI()
+        const txData = gnosisSafe.methods.removeOwner(prevAddress, owner.address, threshold).encodeABI()
 
         if (isCurrent) {
           setData(txData)
@@ -107,7 +106,7 @@ export const ReviewRemoveOwnerModal = ({
     return () => {
       isCurrent = false
     }
-  }, [safeAddress, ownerAddress, threshold])
+  }, [safeAddress, owner.address, threshold])
 
   const closeEditModalCallback = (txParameters: TxParameters) => {
     const oldGasPrice = Number(gasPriceFormatted)
@@ -186,17 +185,17 @@ export const ReviewRemoveOwnerModal = ({
                 </Row>
                 <Hairline />
                 {owners?.map(
-                  (owner) =>
-                    owner.address !== ownerAddress && (
-                      <React.Fragment key={owner.address}>
+                  (safeOwner) =>
+                    !sameAddress(safeOwner.address, owner.address) && (
+                      <React.Fragment key={safeOwner.address}>
                         <Row className={classes.owner}>
                           <Col align="center" xs={12}>
                             <EthHashInfo
-                              hash={owner.address}
-                              name={owner.name}
+                              hash={safeOwner.address}
+                              name={safeOwner.name}
                               showCopyBtn
                               showAvatar
-                              explorerUrl={getExplorerInfo(owner.address)}
+                              explorerUrl={getExplorerInfo(safeOwner.address)}
                             />
                           </Col>
                         </Row>
@@ -213,11 +212,11 @@ export const ReviewRemoveOwnerModal = ({
                 <Row className={classes.selectedOwner}>
                   <Col align="center" xs={12}>
                     <EthHashInfo
-                      hash={ownerAddress}
-                      name={ownerName}
+                      hash={owner.address}
+                      name={owner.name}
                       showCopyBtn
                       showAvatar
-                      explorerUrl={getExplorerInfo(ownerAddress)}
+                      explorerUrl={getExplorerInfo(owner.address)}
                     />
                   </Col>
                 </Row>
diff --git a/src/routes/safe/components/Settings/ManageOwners/ReplaceOwnerModal/index.tsx b/src/routes/safe/components/Settings/ManageOwners/ReplaceOwnerModal/index.tsx
index b43ea806..789ce192 100644
--- a/src/routes/safe/components/Settings/ManageOwners/ReplaceOwnerModal/index.tsx
+++ b/src/routes/safe/components/Settings/ManageOwners/ReplaceOwnerModal/index.tsx
@@ -15,14 +15,16 @@ import { Dispatch } from 'src/logic/safe/store/actions/types.d'
 import { OwnerForm } from 'src/routes/safe/components/Settings/ManageOwners/ReplaceOwnerModal/screens/OwnerForm'
 import { ReviewReplaceOwnerModal } from 'src/routes/safe/components/Settings/ManageOwners/ReplaceOwnerModal/screens/Review'
 import { TxParameters } from 'src/routes/safe/container/hooks/useTransactionParameters'
+import { isValidAddress } from 'src/utils/isValidAddress'
+import { OwnerData } from 'src/routes/safe/components/Settings/ManageOwners/dataFetcher'
 
 export type OwnerValues = {
-  newOwnerAddress: string
-  newOwnerName: string
+  address: string
+  name: string
 }
 
 export const sendReplaceOwner = async (
-  values: OwnerValues,
+  newOwner: OwnerValues,
   safeAddress: string,
   ownerAddressToRemove: string,
   dispatch: Dispatch,
@@ -32,7 +34,7 @@ export const sendReplaceOwner = async (
   const safeOwners = await gnosisSafe.methods.getOwners().call()
   const index = safeOwners.findIndex((ownerAddress) => sameAddress(ownerAddress, ownerAddressToRemove))
   const prevAddress = index === 0 ? SENTINEL_ADDRESS : safeOwners[index - 1]
-  const txData = gnosisSafe.methods.swapOwner(prevAddress, ownerAddressToRemove, values.newOwnerAddress).encodeABI()
+  const txData = gnosisSafe.methods.swapOwner(prevAddress, ownerAddressToRemove, newOwner.address).encodeABI()
 
   const txHash = await dispatch(
     createTransaction({
@@ -49,45 +51,26 @@ export const sendReplaceOwner = async (
 
   if (txHash) {
     // update the AB
-    dispatch(
-      addressBookAddOrUpdate(
-        makeAddressBookEntry({
-          address: values.newOwnerAddress,
-          name: values.newOwnerName,
-        }),
-      ),
-    )
+    dispatch(addressBookAddOrUpdate(makeAddressBookEntry(newOwner)))
   }
 }
 
 type ReplaceOwnerProps = {
   isOpen: boolean
   onClose: () => void
-  ownerAddress: string
-  ownerName: string
+  owner: OwnerData
 }
 
-export const ReplaceOwnerModal = ({
-  isOpen,
-  onClose,
-  ownerAddress,
-  ownerName,
-}: ReplaceOwnerProps): React.ReactElement => {
+export const ReplaceOwnerModal = ({ isOpen, onClose, owner }: ReplaceOwnerProps): React.ReactElement => {
   const [activeScreen, setActiveScreen] = useState('checkOwner')
-  const [values, setValues] = useState({
-    newOwnerAddress: '',
-    newOwnerName: '',
-  })
+  const [newOwner, setNewOwner] = useState({ address: '', name: '' })
   const dispatch = useDispatch()
   const safeAddress = useSelector(safeParamAddressFromStateSelector)
 
   useEffect(
     () => () => {
       setActiveScreen('checkOwner')
-      setValues({
-        newOwnerAddress: '',
-        newOwnerName: '',
-      })
+      setNewOwner({ address: '', name: '' })
     },
     [isOpen],
   )
@@ -96,22 +79,19 @@ export const ReplaceOwnerModal = ({
 
   const ownerSubmitted = (newValues) => {
     const { ownerAddress, ownerName } = newValues
-    const checksumAddr = checksumAddress(ownerAddress)
-    setValues({
-      newOwnerAddress: checksumAddr,
-      newOwnerName: ownerName,
-    })
-    setActiveScreen('reviewReplaceOwner')
+
+    if (isValidAddress(ownerAddress)) {
+      const checksumAddr = checksumAddress(ownerAddress)
+      setNewOwner({ address: checksumAddr, name: ownerName })
+      setActiveScreen('reviewReplaceOwner')
+    }
   }
 
   const onReplaceOwner = async (txParameters: TxParameters) => {
     onClose()
     try {
-      await sendReplaceOwner(values, safeAddress, ownerAddress, dispatch, txParameters)
-
-      dispatch(
-        addressBookAddOrUpdate(makeAddressBookEntry({ address: values.newOwnerAddress, name: values.newOwnerName })),
-      )
+      await sendReplaceOwner(newOwner, safeAddress, owner.address, dispatch, txParameters)
+      dispatch(addressBookAddOrUpdate(makeAddressBookEntry(newOwner)))
     } catch (error) {
       console.error('Error while removing an owner', error)
     }
@@ -127,22 +107,15 @@ export const ReplaceOwnerModal = ({
     >
       <>
         {activeScreen === 'checkOwner' && (
-          <OwnerForm
-            onClose={onClose}
-            onSubmit={ownerSubmitted}
-            initialValues={values}
-            ownerAddress={ownerAddress}
-            ownerName={ownerName}
-          />
+          <OwnerForm onClose={onClose} onSubmit={ownerSubmitted} initialValues={newOwner} owner={owner} />
         )}
         {activeScreen === 'reviewReplaceOwner' && (
           <ReviewReplaceOwnerModal
             onClickBack={onClickBack}
             onClose={onClose}
             onSubmit={onReplaceOwner}
-            ownerAddress={ownerAddress}
-            ownerName={ownerName}
-            values={values}
+            owner={owner}
+            newOwner={newOwner}
           />
         )}
       </>
diff --git a/src/routes/safe/components/Settings/ManageOwners/ReplaceOwnerModal/screens/OwnerForm/index.tsx b/src/routes/safe/components/Settings/ManageOwners/ReplaceOwnerModal/screens/OwnerForm/index.tsx
index 29f44a2d..1de744cb 100644
--- a/src/routes/safe/components/Settings/ManageOwners/ReplaceOwnerModal/screens/OwnerForm/index.tsx
+++ b/src/routes/safe/components/Settings/ManageOwners/ReplaceOwnerModal/screens/OwnerForm/index.tsx
@@ -26,6 +26,7 @@ import { Modal } from 'src/components/Modal'
 import { safeOwnersSelector, safeParamAddressFromStateSelector } from 'src/logic/safe/store/selectors'
 import { addressBookMapSelector } from 'src/logic/addressBook/store/selectors'
 import { web3ReadOnly } from 'src/logic/wallets/getWeb3'
+import { OwnerData } from 'src/routes/safe/components/Settings/ManageOwners/dataFetcher'
 
 import { useStyles } from './style'
 import { getExplorerInfo, getNetworkId } from 'src/config'
@@ -59,18 +60,11 @@ type NewOwnerProps = {
 type OwnerFormProps = {
   onClose: () => void
   onSubmit: (values: NewOwnerProps) => void
-  ownerAddress: string
-  ownerName: string
+  owner: OwnerData
   initialValues?: OwnerValues
 }
 
-export const OwnerForm = ({
-  onClose,
-  onSubmit,
-  ownerAddress,
-  ownerName,
-  initialValues,
-}: OwnerFormProps): ReactElement => {
+export const OwnerForm = ({ onClose, onSubmit, owner, initialValues }: OwnerFormProps): ReactElement => {
   const classes = useStyles()
 
   const handleSubmit = (values: NewOwnerProps) => {
@@ -99,8 +93,8 @@ export const OwnerForm = ({
         formMutators={formMutators}
         onSubmit={handleSubmit}
         initialValues={{
-          ownerName: initialValues?.newOwnerName,
-          ownerAddress: initialValues?.newOwnerAddress,
+          ownerName: initialValues?.name,
+          ownerAddress: initialValues?.address,
         }}
       >
         {(...args) => {
@@ -132,11 +126,11 @@ export const OwnerForm = ({
                 <Row className={classes.owner}>
                   <Col align="center" xs={12}>
                     <EthHashInfo
-                      hash={ownerAddress}
-                      name={ownerName}
+                      hash={owner.address}
+                      name={owner.name}
                       showCopyBtn
                       showAvatar
-                      explorerUrl={getExplorerInfo(ownerAddress)}
+                      explorerUrl={getExplorerInfo(owner.address)}
                     />
                   </Col>
                 </Row>
diff --git a/src/routes/safe/components/Settings/ManageOwners/ReplaceOwnerModal/screens/Review/index.tsx b/src/routes/safe/components/Settings/ManageOwners/ReplaceOwnerModal/screens/Review/index.tsx
index 54fbf898..5e3654a7 100644
--- a/src/routes/safe/components/Settings/ManageOwners/ReplaceOwnerModal/screens/Review/index.tsx
+++ b/src/routes/safe/components/Settings/ManageOwners/ReplaceOwnerModal/screens/Review/index.tsx
@@ -24,6 +24,8 @@ import { TxParameters } from 'src/routes/safe/container/hooks/useTransactionPara
 import { Modal } from 'src/components/Modal'
 import { TransactionFees } from 'src/components/TransactionsFees'
 import { EditableTxParameters } from 'src/routes/safe/components/Transactions/helpers/EditableTxParameters'
+import { sameAddress } from 'src/logic/wallets/ethAddresses'
+import { OwnerData } from 'src/routes/safe/components/Settings/ManageOwners/dataFetcher'
 
 import { useStyles } from './style'
 
@@ -35,11 +37,10 @@ type ReplaceOwnerProps = {
   onClose: () => void
   onClickBack: () => void
   onSubmit: (txParameters: TxParameters) => void
-  ownerAddress: string
-  ownerName: string
-  values: {
-    newOwnerAddress: string
-    newOwnerName: string
+  owner: OwnerData
+  newOwner: {
+    address: string
+    name: string
   }
 }
 
@@ -47,9 +48,8 @@ export const ReviewReplaceOwnerModal = ({
   onClickBack,
   onClose,
   onSubmit,
-  ownerAddress,
-  ownerName,
-  values,
+  owner,
+  newOwner,
 }: ReplaceOwnerProps): React.ReactElement => {
   const classes = useStyles()
   const [data, setData] = useState('')
@@ -85,9 +85,9 @@ export const ReviewReplaceOwnerModal = ({
     const calculateReplaceOwnerData = async () => {
       const gnosisSafe = getGnosisSafeInstanceAt(safeAddress)
       const safeOwners = await gnosisSafe.methods.getOwners().call()
-      const index = safeOwners.findIndex((owner) => owner.toLowerCase() === ownerAddress.toLowerCase())
+      const index = safeOwners.findIndex((ownerAddress) => sameAddress(ownerAddress, owner.address))
       const prevAddress = index === 0 ? SENTINEL_ADDRESS : safeOwners[index - 1]
-      const txData = gnosisSafe.methods.swapOwner(prevAddress, ownerAddress, values.newOwnerAddress).encodeABI()
+      const txData = gnosisSafe.methods.swapOwner(prevAddress, owner.address, newOwner.address).encodeABI()
       if (isCurrent) {
         setData(txData)
       }
@@ -97,7 +97,7 @@ export const ReviewReplaceOwnerModal = ({
     return () => {
       isCurrent = false
     }
-  }, [ownerAddress, safeAddress, values.newOwnerAddress])
+  }, [owner.address, safeAddress, newOwner.address])
 
   const closeEditModalCallback = (txParameters: TxParameters) => {
     const oldGasPrice = Number(gasPriceFormatted)
@@ -174,17 +174,17 @@ export const ReviewReplaceOwnerModal = ({
                 </Row>
                 <Hairline />
                 {owners?.map(
-                  (owner) =>
-                    owner.address !== ownerAddress && (
-                      <React.Fragment key={owner.address}>
+                  (safeOwner) =>
+                    !sameAddress(safeOwner.address, owner.address) && (
+                      <React.Fragment key={safeOwner.address}>
                         <Row className={classes.owner}>
                           <Col align="center" xs={12}>
                             <EthHashInfo
-                              hash={owner.address}
-                              name={owner.name}
+                              hash={safeOwner.address}
+                              name={safeOwner.name}
                               showCopyBtn
                               showAvatar
-                              explorerUrl={getExplorerInfo(owner.address)}
+                              explorerUrl={getExplorerInfo(safeOwner.address)}
                             />
                           </Col>
                         </Row>
@@ -201,11 +201,11 @@ export const ReviewReplaceOwnerModal = ({
                 <Row className={classes.selectedOwnerRemoved}>
                   <Col align="center" xs={12}>
                     <EthHashInfo
-                      hash={ownerAddress}
-                      name={ownerName}
+                      hash={owner.address}
+                      name={owner.name}
                       showCopyBtn
                       showAvatar
-                      explorerUrl={getExplorerInfo(ownerAddress)}
+                      explorerUrl={getExplorerInfo(owner.address)}
                     />
                   </Col>
                 </Row>
@@ -218,11 +218,11 @@ export const ReviewReplaceOwnerModal = ({
                 <Row className={classes.selectedOwnerAdded}>
                   <Col align="center" xs={12}>
                     <EthHashInfo
-                      hash={values.newOwnerAddress}
-                      name={values.newOwnerName}
+                      hash={newOwner.address}
+                      name={newOwner.name}
                       showCopyBtn
                       showAvatar
-                      explorerUrl={getExplorerInfo(values.newOwnerAddress)}
+                      explorerUrl={getExplorerInfo(newOwner.address)}
                     />
                   </Col>
                 </Row>
diff --git a/src/routes/safe/components/Settings/ManageOwners/dataFetcher.ts b/src/routes/safe/components/Settings/ManageOwners/dataFetcher.ts
index 171c7499..b77fdc99 100644
--- a/src/routes/safe/components/Settings/ManageOwners/dataFetcher.ts
+++ b/src/routes/safe/components/Settings/ManageOwners/dataFetcher.ts
@@ -7,7 +7,9 @@ export const OWNERS_TABLE_NAME_ID = 'name'
 export const OWNERS_TABLE_ADDRESS_ID = 'address'
 export const OWNERS_TABLE_ACTIONS_ID = 'actions'
 
-export const getOwnerData = (owners: AddressBookState): { address: string; name: string }[] => {
+export type OwnerData = { address: string; name: string }
+
+export const getOwnerData = (owners: AddressBookState): OwnerData[] => {
   return owners.map((owner) => ({
     [OWNERS_TABLE_NAME_ID]: owner.name,
     [OWNERS_TABLE_ADDRESS_ID]: owner.address,
diff --git a/src/routes/safe/components/Settings/ManageOwners/index.tsx b/src/routes/safe/components/Settings/ManageOwners/index.tsx
index 1cc25060..11a57934 100644
--- a/src/routes/safe/components/Settings/ManageOwners/index.tsx
+++ b/src/routes/safe/components/Settings/ManageOwners/index.tsx
@@ -1,4 +1,4 @@
-import React, { useState, useEffect } from 'react'
+import React, { useState, useEffect, ReactElement } from 'react'
 import { EthHashInfo } from '@gnosis.pm/safe-react-components'
 import TableCell from '@material-ui/core/TableCell'
 import TableContainer from '@material-ui/core/TableContainer'
@@ -13,7 +13,7 @@ import { RemoveOwnerModal } from './RemoveOwnerModal'
 import { ReplaceOwnerModal } from './ReplaceOwnerModal'
 import RenameOwnerIcon from './assets/icons/rename-owner.svg'
 import ReplaceOwnerIcon from './assets/icons/replace-owner.svg'
-import { OWNERS_TABLE_ADDRESS_ID, generateColumns, getOwnerData } from './dataFetcher'
+import { OWNERS_TABLE_ADDRESS_ID, generateColumns, getOwnerData, OwnerData } from './dataFetcher'
 import { useStyles } from './style'
 
 import { getExplorerInfo } from 'src/config'
@@ -41,12 +41,11 @@ type Props = {
   owners: AddressBookState
 }
 
-const ManageOwners = ({ granted, owners }: Props): React.ReactElement => {
+const ManageOwners = ({ granted, owners }: Props): ReactElement => {
   const { trackEvent } = useAnalytics()
   const classes = useStyles()
 
-  const [selectedOwnerAddress, setSelectedOwnerAddress] = useState('')
-  const [selectedOwnerName, setSelectedOwnerName] = useState('')
+  const [selectedOwner, setSelectedOwner] = useState<OwnerData | undefined>()
   const [modalsStatus, setModalStatus] = useState({
     showAddOwner: false,
     showRemoveOwner: false,
@@ -54,13 +53,14 @@ const ManageOwners = ({ granted, owners }: Props): React.ReactElement => {
     showEditOwner: false,
   })
 
-  const onShow = (action, row?: any) => () => {
+  const onShow = (action, row?: OwnerData) => () => {
     setModalStatus((prevState) => ({
       ...prevState,
       [`show${action}`]: !prevState[`show${action}`],
     }))
-    setSelectedOwnerAddress(row && row.address)
-    setSelectedOwnerName(row && row.name)
+    if (row) {
+      setSelectedOwner(row)
+    }
   }
 
   const onHide = (action) => () => {
@@ -68,8 +68,7 @@ const ManageOwners = ({ granted, owners }: Props): React.ReactElement => {
       ...prevState,
       [`show${action}`]: !Boolean(prevState[`show${action}`]),
     }))
-    setSelectedOwnerAddress('')
-    setSelectedOwnerName('')
+    setSelectedOwner(undefined)
   }
 
   useEffect(() => {
@@ -180,24 +179,21 @@ const ManageOwners = ({ granted, owners }: Props): React.ReactElement => {
         </>
       )}
       <AddOwnerModal isOpen={modalsStatus.showAddOwner} onClose={onHide('AddOwner')} />
-      <RemoveOwnerModal
-        isOpen={modalsStatus.showRemoveOwner}
-        onClose={onHide('RemoveOwner')}
-        ownerAddress={selectedOwnerAddress}
-        ownerName={selectedOwnerName}
-      />
-      <ReplaceOwnerModal
-        isOpen={modalsStatus.showReplaceOwner}
-        onClose={onHide('ReplaceOwner')}
-        ownerAddress={selectedOwnerAddress}
-        ownerName={selectedOwnerName}
-      />
-      <EditOwnerModal
-        isOpen={modalsStatus.showEditOwner}
-        onClose={onHide('EditOwner')}
-        ownerAddress={selectedOwnerAddress}
-        selectedOwnerName={selectedOwnerName}
-      />
+      {selectedOwner && (
+        <>
+          <RemoveOwnerModal
+            isOpen={modalsStatus.showRemoveOwner}
+            onClose={onHide('RemoveOwner')}
+            owner={selectedOwner}
+          />
+          <ReplaceOwnerModal
+            isOpen={modalsStatus.showReplaceOwner}
+            onClose={onHide('ReplaceOwner')}
+            owner={selectedOwner}
+          />
+          <EditOwnerModal isOpen={modalsStatus.showEditOwner} onClose={onHide('EditOwner')} owner={selectedOwner} />
+        </>
+      )}
     </>
   )
 }
diff --git a/src/utils/__tests__/checksumAddress.test.ts b/src/utils/__tests__/checksumAddress.test.ts
new file mode 100644
index 00000000..bda3d541
--- /dev/null
+++ b/src/utils/__tests__/checksumAddress.test.ts
@@ -0,0 +1,20 @@
+import { checksumAddress, isChecksumAddress } from '../checksumAddress'
+
+describe('checksumAddress', () => {
+  it('Returns a checksummed address', () => {
+    const address = '0xbaddad0000000000000000000000000000000001'
+    const checksummedAddress = checksumAddress(address)
+
+    expect(checksummedAddress).toBe('0xbAddaD0000000000000000000000000000000001')
+    expect(isChecksumAddress(checksummedAddress)).toBeTruthy()
+  })
+  it('Throws if an invalid address was provided', () => {
+    const address = '0xbaddad'
+
+    try {
+      checksumAddress(address)
+    } catch (e) {
+      expect(e.message).toBe('Given address "0xbaddad" is not a valid Ethereum address.')
+    }
+  })
+})
diff --git a/src/utils/__tests__/isValidAddress.test.ts b/src/utils/__tests__/isValidAddress.test.ts
new file mode 100644
index 00000000..a24ca910
--- /dev/null
+++ b/src/utils/__tests__/isValidAddress.test.ts
@@ -0,0 +1,19 @@
+import { isValidAddress } from '../isValidAddress'
+
+describe('isValidAddress', () => {
+  it('Returns false for an empty string', () => {
+    expect(isValidAddress('')).toBeFalsy()
+  })
+  it('Returns false when address is `undefined`', () => {
+    expect(isValidAddress(undefined)).toBeFalsy()
+  })
+  it('Returns false for `0x123`', () => {
+    expect(isValidAddress('0x123')).toBeFalsy()
+  })
+  it('Returns false for a valid address without `0x` prefix', () => {
+    expect(isValidAddress('0000000000000000000000000000000000000001')).toBeFalsy()
+  })
+  it('Returns true for a valid address with `0x` prefix', () => {
+    expect(isValidAddress('0x0000000000000000000000000000000000000001')).toBeTruthy()
+  })
+})
diff --git a/src/utils/checksumAddress.ts b/src/utils/checksumAddress.ts
index b0cd1fdc..a9207bac 100644
--- a/src/utils/checksumAddress.ts
+++ b/src/utils/checksumAddress.ts
@@ -1,5 +1,11 @@
-import { getWeb3 } from 'src/logic/wallets/getWeb3'
+import { checkAddressChecksum, toChecksumAddress } from 'web3-utils'
 
-export const checksumAddress = (address: string): string => {
-  return getWeb3().utils.toChecksumAddress(address)
+export const checksumAddress = (address: string): string => toChecksumAddress(address)
+
+export const isChecksumAddress = (address?: string): boolean => {
+  if (address) {
+    return checkAddressChecksum(address)
+  }
+
+  return false
 }
diff --git a/src/utils/isValidAddress.ts b/src/utils/isValidAddress.ts
new file mode 100644
index 00000000..dc7fe03c
--- /dev/null
+++ b/src/utils/isValidAddress.ts
@@ -0,0 +1,11 @@
+import { isAddress, isHexStrict } from 'web3-utils'
+
+export const isValidAddress = (address?: string): boolean => {
+  if (address) {
+    // `isAddress` do not require the string to start with `0x`
+    // `isHexStrict` ensures the address to start with `0x` aside from being a valid hex string
+    return isHexStrict(address) && isAddress(address)
+  }
+
+  return false
+}