From Collins Computing comes a TIP – Recording a Rebate or Refund from a Vendor
Collins Dynamics GP Blog: TIP – Recording a Rebate or Refund from a Vendor
Payables & ReceivablesTips & Hidden FeaturesMicrosoft & the GP Ecosystem
Archived post from 2012. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.