Hubdoc - Warning if supplier bank account in Xero is different
Hubdoc could read bank accounts and a warning pop up if they differ from that in Xero.

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Sharon Connaughton commented
It would be such a good tool if the bank account is verified as part of the payment process. Bank accounts do change and close, therefore I would rather the transaction checked at time of processing rather than being notified of a late payment due and trying to track this with the bank