One of my clients has a vendor that requires pre-payments before shipping materials to them. However, the actual shipment is almost always different than what was ordered, so the pre-payment does not match the Vendor's invoice. They have quite a mess with the records for this vendor, and I need to help them get it cleaned up and have a correct process going forward. I've not had a lot of experience with vendor prepayments, so I'm looking for some advice on how to properly process vendor's invoices and prepayments when they don't match.
Thanks in advance for whatever help and direction you can give me.
Dan