The ability to apply money back to a PO when a vendor credit invoice is posted.

Example: PO-1234 $10,000

Paid invoice for $5,000 on PO-1234. PO is reduced to $5,000

After the invoice was posted, it was discovered the wrong value was invoiced. The vendor sends a credit memo to cancel the previous invoice. They also send a new invoice for the correct value.

We can apply the credit memo of $5,000 to PO-1234; however, at this time, it does not increase the PO by $5,000, returning the PO value to $10,000.

When the new invoice is received for $6,000, AP will reject it due to insufficient funds on the PO.