The Assign On Save Checkbox is used to indicate whether or not the invoice being processed should be assigned to a different vendor as it is being saved. If the box is checked when a new invoice is saved, the system will activate the Assign AP Invoice program and it will prompt you for the name of the vendor to whom the invoice should be assigned for payment purposes. When the assignment Option is used, the selected invoice is closed and a new invoice is created for the vendor specified during assignment. A journal entry is also created by the system to link the two invoices and record the transaction. Please see the discussion on Invoice Assignment in the Overview section of this document, or the documentation for the Assign AP Invoice Program for more information about invoice assignment.