diff --git a/src/logic/addressBook/store/reducer/addressBook.js b/src/logic/addressBook/store/reducer/addressBook.js
index 93f4ebf7..2f8e5bfb 100644
--- a/src/logic/addressBook/store/reducer/addressBook.js
+++ b/src/logic/addressBook/store/reducer/addressBook.js
@@ -12,6 +12,7 @@ import { REMOVE_ENTRY } from '~/logic/addressBook/store/actions/removeAddressBoo
 import { UPDATE_ENTRY } from '~/logic/addressBook/store/actions/updateAddressBookEntry'
 import { getAddressesListFromAdbk } from '~/logic/addressBook/utils'
 import { sameAddress } from '~/logic/wallets/ethAddresses'
+import { checksumAddress } from '~/utils/checksumAddress'
 
 export const ADDRESS_BOOK_REDUCER_ID = 'addressBook'
 
@@ -20,7 +21,7 @@ export type State = Map<string, Map<string, AddressBookEntry>>
 export const buildAddressBook = (storedAdbk: AddressBook): AddressBookProps => {
   let addressBookBuilt = Map([])
   Object.entries(storedAdbk).forEach((adbkProps: Array<string, AddressBookEntry[]>) => {
-    const safeAddress = adbkProps[0]
+    const safeAddress = checksumAddress(adbkProps[0])
     const adbkRecords = adbkProps[1].map(makeAddressBookEntry)
     const adbkSafeEntries = List(adbkRecords)
     addressBookBuilt = addressBookBuilt.set(safeAddress, adbkSafeEntries)
diff --git a/src/logic/safe/transactions/incomingTxHistory.js b/src/logic/safe/transactions/incomingTxHistory.js
index b716c9c6..36d69a54 100644
--- a/src/logic/safe/transactions/incomingTxHistory.js
+++ b/src/logic/safe/transactions/incomingTxHistory.js
@@ -1,10 +1,10 @@
 // @flow
 import { getIncomingTxServiceUriTo, getTxServiceHost } from '~/config'
-import { getWeb3 } from '~/logic/wallets/getWeb3'
+import { checksumAddress } from '~/utils/checksumAddress'
 
 export const buildIncomingTxServiceUrl = (safeAddress: string) => {
   const host = getTxServiceHost()
-  const address = getWeb3().utils.toChecksumAddress(safeAddress)
+  const address = checksumAddress(safeAddress)
   const base = getIncomingTxServiceUriTo(address)
 
   return `${host}${base}`
diff --git a/src/logic/safe/transactions/txHistory.js b/src/logic/safe/transactions/txHistory.js
index e597e8d9..08dcee27 100644
--- a/src/logic/safe/transactions/txHistory.js
+++ b/src/logic/safe/transactions/txHistory.js
@@ -2,7 +2,7 @@
 import axios from 'axios'
 
 import { getTxServiceHost, getTxServiceUriFrom } from '~/config'
-import { getWeb3 } from '~/logic/wallets/getWeb3'
+import { checksumAddress } from '~/utils/checksumAddress'
 
 export type TxServiceType = 'confirmation' | 'execution' | 'initialised'
 export type Operation = 0 | 1 | 2
@@ -38,7 +38,7 @@ const calculateBodyFrom = async (
   )
 
   return {
-    to: getWeb3().utils.toChecksumAddress(to),
+    to: checksumAddress(to),
     value: valueInWei,
     data,
     operation,
@@ -50,7 +50,7 @@ const calculateBodyFrom = async (
     refundReceiver,
     contractTransactionHash,
     transactionHash,
-    sender: getWeb3().utils.toChecksumAddress(sender),
+    sender: checksumAddress(sender),
     origin,
     signature,
   }
@@ -58,7 +58,7 @@ const calculateBodyFrom = async (
 
 export const buildTxServiceUrl = (safeAddress: string) => {
   const host = getTxServiceHost()
-  const address = getWeb3().utils.toChecksumAddress(safeAddress)
+  const address = checksumAddress(safeAddress)
   const base = getTxServiceUriFrom(address)
   return `${host}${base}`
 }
diff --git a/src/routes/safe/components/AddressBook/index.jsx b/src/routes/safe/components/AddressBook/index.jsx
index 1b776314..e9af8066 100644
--- a/src/routes/safe/components/AddressBook/index.jsx
+++ b/src/routes/safe/components/AddressBook/index.jsx
@@ -44,6 +44,7 @@ import type { OwnerRow } from '~/routes/safe/components/Settings/ManageOwners/da
 import RemoveOwnerIcon from '~/routes/safe/components/Settings/assets/icons/bin.svg'
 import RemoveOwnerIconDisabled from '~/routes/safe/components/Settings/assets/icons/disabled-bin.svg'
 import { addressBookQueryParamsSelector, safesListSelector } from '~/routes/safe/store/selectors'
+import { checksumAddress } from '~/utils/checksumAddress'
 
 type Props = {
   classes: Object,
@@ -69,7 +70,8 @@ const AddressBookTable = ({ classes }: Props) => {
 
   useEffect(() => {
     if (entryAddressToEditOrCreateNew) {
-      const key = addressBook.findKey((entry) => entry.address === entryAddressToEditOrCreateNew)
+      const checksumEntryAdd = checksumAddress(entryAddressToEditOrCreateNew)
+      const key = addressBook.findKey((entry) => entry.address === checksumEntryAdd)
       if (key >= 0) {
         // Edit old entry
         const value = addressBook.get(key)
@@ -79,7 +81,7 @@ const AddressBookTable = ({ classes }: Props) => {
         setSelectedEntry({
           entry: {
             name: '',
-            address: entryAddressToEditOrCreateNew,
+            address: checksumEntryAdd,
             isNew: true,
           },
         })
@@ -89,17 +91,25 @@ const AddressBookTable = ({ classes }: Props) => {
 
   const newEntryModalHandler = (entry: AddressBookEntry) => {
     setEditCreateEntryModalOpen(false)
-    dispatch(addAddressBookEntry(makeAddressBookEntry(entry)))
+    const checksumEntries = {
+      ...entry,
+      address: checksumAddress(entry.address),
+    }
+    dispatch(addAddressBookEntry(makeAddressBookEntry(checksumEntries)))
   }
 
   const editEntryModalHandler = (entry: AddressBookEntry) => {
     setSelectedEntry(null)
     setEditCreateEntryModalOpen(false)
-    dispatch(updateAddressBookEntry(makeAddressBookEntry(entry)))
+    const checksumEntries = {
+      ...entry,
+      address: checksumAddress(entry.address),
+    }
+    dispatch(updateAddressBookEntry(makeAddressBookEntry(checksumEntries)))
   }
 
   const deleteEntryModalHandler = () => {
-    const entryAddress = selectedEntry.entry.address
+    const entryAddress = checksumAddress(selectedEntry.entry.address)
     setSelectedEntry(null)
     setDeleteEntryModalOpen(false)
     dispatch(removeAddressBookEntry(entryAddress))
diff --git a/src/routes/safe/components/Balances/Tokens/screens/AddCustomToken/index.jsx b/src/routes/safe/components/Balances/Tokens/screens/AddCustomToken/index.jsx
index 085c4c5a..a27be2bb 100644
--- a/src/routes/safe/components/Balances/Tokens/screens/AddCustomToken/index.jsx
+++ b/src/routes/safe/components/Balances/Tokens/screens/AddCustomToken/index.jsx
@@ -21,8 +21,8 @@ import Img from '~/components/layout/Img'
 import Paragraph from '~/components/layout/Paragraph'
 import Row from '~/components/layout/Row'
 import { type Token, type TokenProps } from '~/logic/tokens/store/model/token'
-import { getWeb3 } from '~/logic/wallets/getWeb3'
 import TokenPlaceholder from '~/routes/safe/components/Balances/assets/token_placeholder.svg'
+import { checksumAddress } from '~/utils/checksumAddress'
 
 export const ADD_CUSTOM_TOKEN_ADDRESS_INPUT_TEST_ID = 'add-custom-token-address-input'
 export const ADD_CUSTOM_TOKEN_SYMBOLS_INPUT_TEST_ID = 'add-custom-token-symbols-input'
@@ -65,7 +65,7 @@ const AddCustomToken = (props: Props) => {
   const [formValues, setFormValues] = useState(INITIAL_FORM_STATE)
 
   const handleSubmit = (values) => {
-    const address = getWeb3().utils.toChecksumAddress(values.address)
+    const address = checksumAddress(values.address)
     const token = {
       address,
       decimals: values.decimals,
diff --git a/src/routes/safe/components/Settings/ManageOwners/AddOwnerModal/index.jsx b/src/routes/safe/components/Settings/ManageOwners/AddOwnerModal/index.jsx
index e76e1a4d..29be4886 100644
--- a/src/routes/safe/components/Settings/ManageOwners/AddOwnerModal/index.jsx
+++ b/src/routes/safe/components/Settings/ManageOwners/AddOwnerModal/index.jsx
@@ -17,6 +17,7 @@ import addSafeOwner from '~/routes/safe/store/actions/addSafeOwner'
 import createTransaction from '~/routes/safe/store/actions/createTransaction'
 import { type Owner } from '~/routes/safe/store/models/owner'
 import { safeOwnersSelector, safeParamAddressFromStateSelector } from '~/routes/safe/store/selectors'
+import { checksumAddress } from '~/utils/checksumAddress'
 
 const styles = () => ({
   biggerModalWindow: {
@@ -91,7 +92,7 @@ const AddOwner = ({ classes, closeSnackbar, enqueueSnackbar, isOpen, onClose }:
     setValues((stateValues) => ({
       ...stateValues,
       ownerName: newValues.ownerName,
-      ownerAddress: newValues.ownerAddress,
+      ownerAddress: checksumAddress(newValues.ownerAddress),
     }))
     setActiveScreen('selectThreshold')
   }
diff --git a/src/routes/safe/components/Settings/ManageOwners/ReplaceOwnerModal/index.jsx b/src/routes/safe/components/Settings/ManageOwners/ReplaceOwnerModal/index.jsx
index fdcdb5f1..16258d80 100644
--- a/src/routes/safe/components/Settings/ManageOwners/ReplaceOwnerModal/index.jsx
+++ b/src/routes/safe/components/Settings/ManageOwners/ReplaceOwnerModal/index.jsx
@@ -14,6 +14,7 @@ import { TX_NOTIFICATION_TYPES } from '~/logic/safe/transactions'
 import createTransaction from '~/routes/safe/store/actions/createTransaction'
 import replaceSafeOwner from '~/routes/safe/store/actions/replaceSafeOwner'
 import { safeParamAddressFromStateSelector, safeThresholdSelector } from '~/routes/safe/store/selectors'
+import { checksumAddress } from '~/utils/checksumAddress'
 
 const styles = () => ({
   biggerModalWindow: {
@@ -96,8 +97,10 @@ const ReplaceOwner = ({ classes, closeSnackbar, enqueueSnackbar, isOpen, onClose
   const onClickBack = () => setActiveScreen('checkOwner')
 
   const ownerSubmitted = (newValues: Object) => {
-    values.ownerName = newValues.ownerName
-    values.ownerAddress = newValues.ownerAddress
+    const { ownerAddress, ownerName } = newValues
+    const checksumAddr = checksumAddress(ownerAddress)
+    values.ownerName = ownerName
+    values.ownerAddress = checksumAddr
     setValues(values)
     setActiveScreen('reviewReplaceOwner')
   }
diff --git a/src/routes/safe/store/actions/fetchSafe.js b/src/routes/safe/store/actions/fetchSafe.js
index df9b29f3..a85dac77 100644
--- a/src/routes/safe/store/actions/fetchSafe.js
+++ b/src/routes/safe/store/actions/fetchSafe.js
@@ -7,7 +7,7 @@ import generateBatchRequests from '~/logic/contracts/generateBatchRequests'
 import { getLocalSafe, getSafeName } from '~/logic/safe/utils'
 import { enabledFeatures, safeNeedsUpdate } from '~/logic/safe/utils/safeVersion'
 import { sameAddress } from '~/logic/wallets/ethAddresses'
-import { getBalanceInEtherOf, getWeb3 } from '~/logic/wallets/getWeb3'
+import { getBalanceInEtherOf } from '~/logic/wallets/getWeb3'
 import addSafe from '~/routes/safe/store/actions/addSafe'
 import addSafeOwner from '~/routes/safe/store/actions/addSafeOwner'
 import removeSafeOwner from '~/routes/safe/store/actions/removeSafeOwner'
@@ -15,29 +15,31 @@ import updateSafe from '~/routes/safe/store/actions/updateSafe'
 import { makeOwner } from '~/routes/safe/store/models/owner'
 import type { SafeProps } from '~/routes/safe/store/models/safe'
 import { type GlobalState } from '~/store'
+import { checksumAddress } from '~/utils/checksumAddress'
 
 const buildOwnersFrom = (
   safeOwners: string[],
   localSafe: SafeProps | {}, // eslint-disable-next-line
 ) =>
   safeOwners.map((ownerAddress: string) => {
+    const convertedAdd = checksumAddress(ownerAddress)
     if (!localSafe) {
-      return makeOwner({ name: 'UNKNOWN', address: ownerAddress })
+      return makeOwner({ name: 'UNKNOWN', address: convertedAdd })
     }
 
-    const storedOwner = localSafe.owners.find(({ address }) => sameAddress(address, ownerAddress))
+    const storedOwner = localSafe.owners.find(({ address }) => sameAddress(address, convertedAdd))
     if (!storedOwner) {
-      return makeOwner({ name: 'UNKNOWN', address: ownerAddress })
+      return makeOwner({ name: 'UNKNOWN', address: convertedAdd })
     }
 
     return makeOwner({
       name: storedOwner.name || 'UNKNOWN',
-      address: ownerAddress,
+      address: convertedAdd,
     })
   })
 
 export const buildSafe = async (safeAdd: string, safeName: string, latestMasterContractVersion: string) => {
-  const safeAddress = getWeb3().utils.toChecksumAddress(safeAdd)
+  const safeAddress = checksumAddress(safeAdd)
 
   const safeParams = ['getThreshold', 'nonce', 'VERSION', 'getOwners']
   const [[thresholdStr, nonceStr, currentVersion, remoteOwners], localSafe, ethBalance] = await Promise.all([
@@ -72,7 +74,7 @@ export const buildSafe = async (safeAdd: string, safeName: string, latestMasterC
 }
 
 export const checkAndUpdateSafe = (safeAdd: string) => async (dispatch: ReduxDispatch<*>) => {
-  const safeAddress = getWeb3().utils.toChecksumAddress(safeAdd)
+  const safeAddress = checksumAddress(safeAdd)
   // Check if the owner's safe did change and update them
   const safeParams = ['getThreshold', 'nonce', 'getOwners']
   const [[remoteThreshold, remoteNonce, remoteOwners], localSafe] = await Promise.all([
@@ -125,7 +127,7 @@ export const checkAndUpdateSafe = (safeAdd: string) => async (dispatch: ReduxDis
 // eslint-disable-next-line consistent-return
 export default (safeAdd: string) => async (dispatch: ReduxDispatch<GlobalState>, getState: () => GlobalState) => {
   try {
-    const safeAddress = getWeb3().utils.toChecksumAddress(safeAdd)
+    const safeAddress = checksumAddress(safeAdd)
     const safeName = (await getSafeName(safeAddress)) || 'LOADED SAFE'
     const latestMasterContractVersion = getState().safes.get('latestMasterContractVersion')
     const safeProps: SafeProps = await buildSafe(safeAddress, safeName, latestMasterContractVersion)
diff --git a/src/routes/safe/store/actions/loadDefaultSafe.js b/src/routes/safe/store/actions/loadDefaultSafe.js
index eec7ce80..1f689102 100644
--- a/src/routes/safe/store/actions/loadDefaultSafe.js
+++ b/src/routes/safe/store/actions/loadDefaultSafe.js
@@ -4,14 +4,13 @@ import type { Dispatch as ReduxDispatch } from 'redux'
 import setDefaultSafe from './setDefaultSafe'
 
 import { getDefaultSafe } from '~/logic/safe/utils'
-import { getWeb3 } from '~/logic/wallets/getWeb3'
 import { type GlobalState } from '~/store/index'
+import { checksumAddress } from '~/utils/checksumAddress'
 
 const loadDefaultSafe = () => async (dispatch: ReduxDispatch<GlobalState>) => {
   try {
     const defaultSafe: string = await getDefaultSafe()
-    const checksumed =
-      defaultSafe && defaultSafe.length > 0 ? getWeb3().utils.toChecksumAddress(defaultSafe) : defaultSafe
+    const checksumed = defaultSafe && defaultSafe.length > 0 ? checksumAddress(defaultSafe) : defaultSafe
     dispatch(setDefaultSafe(checksumed))
   } catch (err) {
     // eslint-disable-next-line
diff --git a/src/routes/safe/store/reducer/safe.js b/src/routes/safe/store/reducer/safe.js
index 879d81dd..a8b11db8 100644
--- a/src/routes/safe/store/reducer/safe.js
+++ b/src/routes/safe/store/reducer/safe.js
@@ -2,7 +2,6 @@
 import { Map, Set } from 'immutable'
 import { type ActionType, handleActions } from 'redux-actions'
 
-import { getWeb3 } from '~/logic/wallets/getWeb3'
 import { ACTIVATE_TOKEN_FOR_ALL_SAFES } from '~/routes/safe/store/actions/activateTokenForAllSafes'
 import { ADD_SAFE, buildOwnersFrom } from '~/routes/safe/store/actions/addSafe'
 import { ADD_SAFE_OWNER } from '~/routes/safe/store/actions/addSafeOwner'
@@ -15,6 +14,7 @@ import { SET_LATEST_MASTER_CONTRACT_VERSION } from '~/routes/safe/store/actions/
 import { UPDATE_SAFE } from '~/routes/safe/store/actions/updateSafe'
 import { makeOwner } from '~/routes/safe/store/models/owner'
 import SafeRecord, { type SafeProps } from '~/routes/safe/store/models/safe'
+import { checksumAddress } from '~/utils/checksumAddress'
 
 export const SAFE_REDUCER_ID = 'safes'
 
@@ -22,7 +22,7 @@ export type SafeReducerState = Map<string, *>
 
 export const buildSafe = (storedSafe: SafeProps) => {
   const names = storedSafe.owners.map((owner) => owner.name)
-  const addresses = storedSafe.owners.map((owner) => getWeb3().utils.toChecksumAddress(owner.address))
+  const addresses = storedSafe.owners.map((owner) => checksumAddress(owner.address))
   const owners = buildOwnersFrom(Array.from(names), Array.from(addresses))
   const activeTokens = Set(storedSafe.activeTokens)
   const activeAssets = Set(storedSafe.activeAssets)
diff --git a/src/routes/safe/store/selectors/index.js b/src/routes/safe/store/selectors/index.js
index e346eae2..d38e4ee4 100644
--- a/src/routes/safe/store/selectors/index.js
+++ b/src/routes/safe/store/selectors/index.js
@@ -19,6 +19,7 @@ import {
 import { SAFE_REDUCER_ID } from '~/routes/safe/store/reducer/safe'
 import { TRANSACTIONS_REDUCER_ID, type State as TransactionsState } from '~/routes/safe/store/reducer/transactions'
 import { type GlobalState } from '~/store/index'
+import { checksumAddress } from '~/utils/checksumAddress'
 
 export type RouterProps = {
   match: Match,
@@ -76,7 +77,7 @@ export const safeParamAddressFromStateSelector = (state: GlobalState): string |
 
 export const safeParamAddressSelector = (state: GlobalState, props: RouterProps) => {
   const urlAdd = props.match.params[SAFE_PARAM_ADDRESS]
-  return urlAdd ? getWeb3().utils.toChecksumAddress(urlAdd) : ''
+  return urlAdd ? checksumAddress(urlAdd) : ''
 }
 
 type TxSelectorType = OutputSelector<GlobalState, RouterProps, List<Transaction>>
@@ -150,7 +151,7 @@ export const safeSelector: OutputSelector<GlobalState, RouterProps, SafeSelector
     if (!address) {
       return undefined
     }
-    const checksumed = getWeb3().utils.toChecksumAddress(address)
+    const checksumed = checksumAddress(address)
     const safe = safes.get(checksumed)
 
     return safe
diff --git a/src/utils/checksumAddress.js b/src/utils/checksumAddress.js
new file mode 100644
index 00000000..94ca7286
--- /dev/null
+++ b/src/utils/checksumAddress.js
@@ -0,0 +1,7 @@
+// @flow
+import { getWeb3 } from '~/logic/wallets/getWeb3'
+
+export const checksumAddress = (address: string) => {
+  if (!address) return null
+  return getWeb3().utils.toChecksumAddress(address)
+}