Over at WebSan, Praveen Parameshwaran explains Common EFT Issues in Microsoft Dynamics GP 2010
Common EFT Issues in Microsoft Dynamics GP 2010 | WebSan Solutions Blog
Payables & ReceivablesMicrosoft & the GP EcosystemGP 2010
Archived post from 2013. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.