diff --git a/certora/mutations/035_withdraw_account_not_deleted.patch b/certora/mutations/035_withdraw_account_not_deleted.patch
new file mode 100644
index 0000000..1b12854
--- /dev/null
+++ b/certora/mutations/035_withdraw_account_not_deleted.patch
@@ -0,0 +1,13 @@
+diff --git a/contracts/vault/VaultBase.sol b/contracts/vault/VaultBase.sol
+index be21481..ed1fb5f 100644
+--- a/contracts/vault/VaultBase.sol
++++ b/contracts/vault/VaultBase.sol
+@@ -254,8 +254,6 @@ abstract contract VaultBase {
+     account.accumulateFlows(fund.flowEnd());
+     uint128 amount = account.balance.available + account.balance.designated;
+ 
+-    delete _accounts[controller][fundId][accountId];
+-
+     (address owner, ) = Accounts.decodeId(accountId);
+     _token.safeTransfer(owner, amount);
+   }
diff --git a/certora/mutations/036_burnAccount_not_deleted.patch b/certora/mutations/036_burnAccount_not_deleted.patch
new file mode 100644
index 0000000..ac27759
--- /dev/null
+++ b/certora/mutations/036_burnAccount_not_deleted.patch
@@ -0,0 +1,13 @@
+diff --git a/contracts/vault/VaultBase.sol b/contracts/vault/VaultBase.sol
+index be21481..eb679d1 100644
+--- a/contracts/vault/VaultBase.sol
++++ b/contracts/vault/VaultBase.sol
+@@ -230,8 +230,6 @@ abstract contract VaultBase {
+     require(account.flow.incoming == account.flow.outgoing, VaultFlowNotZero());
+     uint128 amount = account.balance.available + account.balance.designated;
+ 
+-    delete _accounts[controller][fundId][accountId];
+-
+     _token.safeTransfer(address(0xdead), amount);
+   }
+ 
diff --git a/certora/mutations/037_burnDesignated_no_decrement.patch b/certora/mutations/037_burnDesignated_no_decrement.patch
new file mode 100644
index 0000000..630b9e1
--- /dev/null
+++ b/certora/mutations/037_burnDesignated_no_decrement.patch
@@ -0,0 +1,13 @@
+diff --git a/contracts/vault/VaultBase.sol b/contracts/vault/VaultBase.sol
+index be21481..29725dc 100644
+--- a/contracts/vault/VaultBase.sol
++++ b/contracts/vault/VaultBase.sol
+@@ -213,7 +213,7 @@ abstract contract VaultBase {
+     Account storage account = _accounts[controller][fundId][accountId];
+     require(account.balance.designated >= amount, VaultInsufficientBalance());
+ 
+-    account.balance.designated -= amount;
++    // account.balance.designated -= amount;
+ 
+     _token.safeTransfer(address(0xdead), amount);
+   }