diff --git a/contracts/LSP0ERC725Account/LSP0ERC725AccountCore.sol b/contracts/LSP0ERC725Account/LSP0ERC725AccountCore.sol
index 2b436afbd..6a8f5ebac 100644
--- a/contracts/LSP0ERC725Account/LSP0ERC725AccountCore.sol
+++ b/contracts/LSP0ERC725Account/LSP0ERC725AccountCore.sol
@@ -543,7 +543,7 @@ abstract contract LSP0ERC725AccountCore is
             // notify the pending owner through LSP1
             pendingNewOwner.notifyUniversalReceiver(
                 _TYPEID_LSP0_OwnershipTransferStarted,
-                ""
+                abi.encode(currentOwner, pendingNewOwner)
             );
 
             // reset the transfer ownership lock
@@ -563,7 +563,7 @@ abstract contract LSP0ERC725AccountCore is
             // notify the pending owner through LSP1
             pendingNewOwner.notifyUniversalReceiver(
                 _TYPEID_LSP0_OwnershipTransferStarted,
-                ""
+                abi.encode(currentOwner, pendingNewOwner)
             );
 
             // reset the transfer ownership lock
@@ -598,6 +598,7 @@ abstract contract LSP0ERC725AccountCore is
 
             _setOwner(pendingOwnerAddress);
             delete _pendingOwner;
+            delete _renounceOwnershipStartedAt;
         } else {
             _acceptOwnership();
         }
@@ -605,13 +606,13 @@ abstract contract LSP0ERC725AccountCore is
         // notify the previous owner if supports LSP1
         previousOwner.notifyUniversalReceiver(
             _TYPEID_LSP0_OwnershipTransferred_SenderNotification,
-            ""
+            abi.encode(previousOwner, pendingOwnerAddress)
         );
 
         // notify the pending owner if supports LSP1
         pendingOwnerAddress.notifyUniversalReceiver(
             _TYPEID_LSP0_OwnershipTransferred_RecipientNotification,
-            ""
+            abi.encode(previousOwner, pendingOwnerAddress)
         );
 
         // If msg.sender != pendingOwnerAddress & verifyAfter is true, Call {lsp20VerifyCallResult} on the new owner
@@ -644,7 +645,7 @@ abstract contract LSP0ERC725AccountCore is
             if (owner() == address(0)) {
                 previousOwner.notifyUniversalReceiver(
                     _TYPEID_LSP0_OwnershipTransferred_SenderNotification,
-                    ""
+                    abi.encode(accountOwner, address(0))
                 );
             }
         } else {
@@ -658,7 +659,7 @@ abstract contract LSP0ERC725AccountCore is
             if (owner() == address(0)) {
                 previousOwner.notifyUniversalReceiver(
                     _TYPEID_LSP0_OwnershipTransferred_SenderNotification,
-                    ""
+                    abi.encode(accountOwner, address(0))
                 );
             }
 
diff --git a/contracts/LSP14Ownable2Step/LSP14Ownable2Step.sol b/contracts/LSP14Ownable2Step/LSP14Ownable2Step.sol
index a5a593803..561e27c83 100644
--- a/contracts/LSP14Ownable2Step/LSP14Ownable2Step.sol
+++ b/contracts/LSP14Ownable2Step/LSP14Ownable2Step.sol
@@ -99,7 +99,7 @@ abstract contract LSP14Ownable2Step is ILSP14Ownable2Step, OwnableUnset {
 
         newOwner.notifyUniversalReceiver(
             _TYPEID_LSP14_OwnershipTransferStarted,
-            ""
+            abi.encode(currentOwner, newOwner)
         );
 
         // reset the transfer ownership lock
@@ -118,12 +118,12 @@ abstract contract LSP14Ownable2Step is ILSP14Ownable2Step, OwnableUnset {
 
         previousOwner.notifyUniversalReceiver(
             _TYPEID_LSP14_OwnershipTransferred_SenderNotification,
-            ""
+            abi.encode(previousOwner, msg.sender)
         );
 
         msg.sender.notifyUniversalReceiver(
             _TYPEID_LSP14_OwnershipTransferred_RecipientNotification,
-            ""
+            abi.encode(previousOwner, msg.sender)
         );
     }
 
@@ -144,7 +144,7 @@ abstract contract LSP14Ownable2Step is ILSP14Ownable2Step, OwnableUnset {
         if (owner() == address(0)) {
             previousOwner.notifyUniversalReceiver(
                 _TYPEID_LSP14_OwnershipTransferred_SenderNotification,
-                ""
+                abi.encode(previousOwner, address(0))
             );
         }
     }
diff --git a/contracts/LSP9Vault/LSP9VaultCore.sol b/contracts/LSP9Vault/LSP9VaultCore.sol
index 0f1281117..6731325ea 100644
--- a/contracts/LSP9Vault/LSP9VaultCore.sol
+++ b/contracts/LSP9Vault/LSP9VaultCore.sol
@@ -440,7 +440,7 @@ contract LSP9VaultCore is
 
         newOwner.notifyUniversalReceiver(
             _TYPEID_LSP9_OwnershipTransferStarted,
-            ""
+            abi.encode(currentOwner, newOwner)
         );
 
         // reset the transfer ownership lock
@@ -462,12 +462,12 @@ contract LSP9VaultCore is
 
         previousOwner.notifyUniversalReceiver(
             _TYPEID_LSP9_OwnershipTransferred_SenderNotification,
-            ""
+            abi.encode(previousOwner, msg.sender)
         );
 
         msg.sender.notifyUniversalReceiver(
             _TYPEID_LSP9_OwnershipTransferred_RecipientNotification,
-            ""
+            abi.encode(previousOwner, msg.sender)
         );
     }
 
@@ -490,7 +490,7 @@ contract LSP9VaultCore is
         if (owner() == address(0)) {
             previousOwner.notifyUniversalReceiver(
                 _TYPEID_LSP9_OwnershipTransferred_SenderNotification,
-                ""
+                abi.encode(previousOwner, address(0))
             );
         }
     }
diff --git a/tests/LSP1UniversalReceiver/LSP1UniversalReceiverDelegateUP.behaviour.ts b/tests/LSP1UniversalReceiver/LSP1UniversalReceiverDelegateUP.behaviour.ts
index f5b241ff1..036d0e187 100644
--- a/tests/LSP1UniversalReceiver/LSP1UniversalReceiverDelegateUP.behaviour.ts
+++ b/tests/LSP1UniversalReceiver/LSP1UniversalReceiverDelegateUP.behaviour.ts
@@ -1573,7 +1573,10 @@ export const shouldBehaveLikeLSP1Delegate = (
             vault.address,
             0,
             LSP1_TYPE_IDS.LSP9OwnershipTransferred_SenderNotification,
-            '0x',
+            abiCoder.encode(
+              ['address', 'address'],
+              [context.universalProfile1.address, context.accounts.owner1.address],
+            ),
             lsp1ReturnedData,
           );
       });
@@ -1649,7 +1652,10 @@ export const shouldBehaveLikeLSP1Delegate = (
             vault.address,
             0,
             LSP1_TYPE_IDS.LSP9OwnershipTransferred_SenderNotification,
-            '0x',
+            abiCoder.encode(
+              ['address', 'address'],
+              [context.universalProfile1.address, context.accounts.owner1.address],
+            ),
             lsp1ReturnedData,
           );
       });
@@ -1732,7 +1738,10 @@ export const shouldBehaveLikeLSP1Delegate = (
             vault.address,
             0,
             LSP1_TYPE_IDS.LSP9OwnershipTransferred_SenderNotification,
-            '0x',
+            abiCoder.encode(
+              ['address', 'address'],
+              [context.universalProfile1.address, context.accounts.owner1.address],
+            ),
             lsp1ReturnedData,
           );
       });
@@ -2882,7 +2891,10 @@ export const shouldBehaveLikeLSP1Delegate = (
             vault.address,
             0,
             LSP1_TYPE_IDS.LSP9OwnershipTransferred_SenderNotification,
-            '0x',
+            abiCoder.encode(
+              ['address', 'address'],
+              [testContext.universalProfile.address, newVaultOwner.address],
+            ),
             expectedReturnedValues,
           );
 
@@ -3004,7 +3016,10 @@ export const shouldBehaveLikeLSP1Delegate = (
           vault.address,
           0,
           LSP1_TYPE_IDS.LSP9OwnershipTransferred_RecipientNotification,
-          '0x',
+          abiCoder.encode(
+            ['address', 'address'],
+            [vaultOwner.address, context.universalProfile1.address],
+          ),
           expectedReturnedValues,
         );
 
diff --git a/tests/LSP20CallVerification/LSP20CallVerification.behaviour.ts b/tests/LSP20CallVerification/LSP20CallVerification.behaviour.ts
index 3298975a8..712194e87 100644
--- a/tests/LSP20CallVerification/LSP20CallVerification.behaviour.ts
+++ b/tests/LSP20CallVerification/LSP20CallVerification.behaviour.ts
@@ -26,6 +26,7 @@ import {
 
 // constants
 import { LSP1_TYPE_IDS, LSP20_SUCCESS_VALUES, OPERATION_TYPES } from '../../constants';
+import { abiCoder } from './..//utils/helpers';
 
 export type LSP20TestContext = {
   accounts: SignerWithAddress[];
@@ -237,7 +238,10 @@ export const shouldBehaveLikeLSP20 = (buildContext: () => Promise<LSP20TestConte
                 context.universalProfile.address,
                 0,
                 LSP1_TYPE_IDS.LSP0OwnershipTransferred_SenderNotification,
-                '0x',
+                abiCoder.encode(
+                  ['address', 'address'],
+                  [newContractOwner.address, ethers.constants.AddressZero],
+                ),
                 '0x',
               );
           });
diff --git a/tests/LSP9Vault/LSP9Vault.behaviour.ts b/tests/LSP9Vault/LSP9Vault.behaviour.ts
index e1debc273..e51ffb2ba 100644
--- a/tests/LSP9Vault/LSP9Vault.behaviour.ts
+++ b/tests/LSP9Vault/LSP9Vault.behaviour.ts
@@ -767,7 +767,10 @@ export const shouldBehaveLikeLSP9 = (
             context.lsp9Vault.address,
             0,
             LSP1_TYPE_IDS.LSP9OwnershipTransferStarted,
-            '0x',
+            abiCoder.encode(
+              ['address', 'address'],
+              [context.accounts.owner.address, context.universalProfile.address],
+            ),
             abiCoder.encode(
               ['bytes', 'bytes'],
               [ethers.utils.hexlify(ethers.utils.toUtf8Bytes('LSP1: typeId out of scope')), '0x'],
diff --git a/tests/UniversalProfile.behaviour.ts b/tests/UniversalProfile.behaviour.ts
index d1eb2f81e..f44a6dc5f 100644
--- a/tests/UniversalProfile.behaviour.ts
+++ b/tests/UniversalProfile.behaviour.ts
@@ -772,7 +772,10 @@ export const shouldBehaveLikeLSP3 = (
             context.universalProfile.address,
             0,
             LSP1_TYPE_IDS.LSP0OwnershipTransferred_SenderNotification,
-            '0x',
+            abiCoder.encode(
+              ['address', 'address'],
+              [newContractOwner.address, ethers.constants.AddressZero],
+            ),
             '0x',
           );
       });