---
title: "Transaction Error Message: Transaction declined (UserAccount Number/ID unknown)"
description: Account number incorrect. Cardholder to check they have correct account number if decline continues, cardholder must contact their bank to rectify.
url: "https://www.trustprotects.me/faqs/transaction-error-message-transaction-declined-useraccount-number-id-unknown/"
updated: "2023-08-08"
category: What to do when a Transaction is declined
---

# Transaction Error Message: Transaction declined (UserAccount Number/ID unknown)

Account number incorrect.

Cardholder to check they have correct account number if decline continues, cardholder must contact their bank to rectify.