Have you tried a corrected invoice with the net difference of $25?   If you are able to cancel the invoice, you could add a credit line to the new invoice of 25.00.   If you are not able to cancel, you could provide a customer statement that would show the invoice with a $25 credit.

Yes, we have tried that but it does two things we dont want.  1. Makes it look like we discounted the order at $25 and impacts revenue on the GL.  2. Doesnt allow us to show the customer had a credit on account. 

We have tried the statement route, but our customers cant pay off that view unfortunately.

The posting controls involved could be mapped to a ‘credit’ or a ‘cogs’ account so it does not impact the revenue.

You could attempt to book a ‘POA’ for the customer as a payment of $25 against the invoice and then manually edit the invoice so it shows a net of $75 to pay.

Manually editing does not provide a good audit trail and causes confusion in our system and people when/if the invoice needs to be re-printed.  This will not work for us.

Have you tried advanced or regular invoices with a write off code for the $25?