Many clients post invoice for a PO by creating a new purchase invoice and using "Get Receipt Lines".

This is to reduce the risk of AP and or Warehouse Dept. inadvertently updating the PO and to maintain the integrity of the PO as it is a legally binding contract that indicates a buyer's intention to pay for the listed items/products at the specified price on the PO.

It is understood by invoicing a PO by creating a new purchase invoice and using the "Get Receipt Lines" function that many PO's posted purchase receipt lines from one vendor can be on one posted purchase invoice. End users would like the attachments related to the Purchase Order(s) populated on the purchase invoice lines to carry over to the purchase invoice and be available to view once the purchase invoice is Posted (Posted Purchase Invoice).