Ian Grieve ran into an odd scenario where the Creditor Contains EFT Bank Details For A Different Creditor
Creditor Contains EFT Bank Details For A Different Creditor | azurecurve
Payables & ReceivablesMicrosoft & the GP Ecosystem
Archived post from 2015. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.