diff --git a/src/logic/contracts/__tests__/safeContractErrors.test.ts b/src/logic/contracts/__tests__/safeContractErrors.test.ts
index 393c921607..188b82c410 100644
--- a/src/logic/contracts/__tests__/safeContractErrors.test.ts
+++ b/src/logic/contracts/__tests__/safeContractErrors.test.ts
@@ -14,6 +14,6 @@ describe('decodeMessage', () => {
   })
 
   it('returns provided errors if not safe errors', () => {
-    expect(decodeMessage('Not a Safe error')).toBe('Not a Safe error')
+    expect(decodeMessage('Not a Safe error')).toBe(null)
   })
 })
diff --git a/src/logic/contracts/safeContractErrors.ts b/src/logic/contracts/safeContractErrors.ts
index 8ef0bb1471..a5ce3ae26f 100644
--- a/src/logic/contracts/safeContractErrors.ts
+++ b/src/logic/contracts/safeContractErrors.ts
@@ -5,12 +5,14 @@ import { getWeb3 } from 'src/logic/wallets/getWeb3'
 import { GnosisSafe } from 'src/types/contracts/gnosis_safe.d'
 import { logError, Errors } from '../exceptions/CodedException'
 
-export const decodeMessage = (message: string): string => {
+const GENERIC_FAILED_TX_MSG = 'unable to decode contract error message'
+
+export const decodeMessage = (message: string): string | null => {
   const code = CONTRACT_ERROR_CODES.find((code) => {
     return message.toUpperCase().includes(code.toUpperCase())
   })
 
-  return code ? `${code}: ${CONTRACT_ERRORS[code]}` : message
+  return code ? `${code}: ${CONTRACT_ERRORS[code]}` : null
 }
 
 export const getContractErrorMessage = async ({
@@ -35,8 +37,9 @@ export const getContractErrorMessage = async ({
     const returnBuffer = Buffer.from(returnData.slice(2), 'hex')
 
     const contractOutput = abi.rawDecode(['string'], returnBuffer.slice(4))[0]
-    return decodeMessage(contractOutput)
+    return decodeMessage(contractOutput) || contractOutput
   } catch (err) {
     logError(Errors._817, err.message)
+    return GENERIC_FAILED_TX_MSG
   }
 }