Sage 100 2014 Advanced. Users have mis-posted a bunch of invoices in PO receipt of invoice, and want to reverse ( or partially adjust) them. If they originated in A/P it is simple to do, but these are from PO and they want the PO quantities/purchases clearing report correct. You can do a PO receipt of invoice with negative quantities, but it does not let you use the same invoice # (to handle it like an adjustment) so you have to use an invoice # with an ""A"" at the end. Does anyone know a way around this, or if not, if your original invoice was for $ 200 of an item, and it should have been $50, so you have an invoice for $ 200.00 and a credit invoice (same # with an A suffix) for $ 150, is the only want to ""apply"" them to use a manual check for a zero amount ? They want the vendor only to see the single correct invoice # and amount - any advice or best practice on this would be greatly appreciated. Thanks in advance.