Payment adjustment within AP

Hi Everyone,

Similar to AR, with AP I would like to have the ability to book an adjustment to a payment at the time the payment is being applied.  For example. 

1. AP Invoice is created for 10,000 with immediate terms.

2. Now I received a payment from the supplier for 10,050.00  I would like to book the payment at 10,000.00 against the invoice and put the extra 50.00 to an adjustment account within the same payment batch.

This amount would fluxuate based on how the payments come in so a bank charge would be out of the question.

Is there a way within AP to book an additional on the fly payment against a supplier if the amount is greater than the invoice?