We entered two vendor prepayments for issued purchase orders. The purchase was canceled by our vendor and the prepayments were returned. How do we book the returned vendor prepayment and are we allowed to close the purchase orders (product never received)? If we book the return of the prepayment via JE by debiting out bank account, tagging the vendor in the name and crediting purchase deposits; will this remove the ability of the prepayment to be erroneously applied to future bills, since the purchase order will be closed?