Removing Payment out of AR system

Good Morning!

We have an employee that applied a payment to an invoice in the AR module but we found out that the vendor paid the wrong account and it should not be in the AR module at all. We have to reimburse their payment and they are going to reissue a new check to the correct customer (not in AR system). I know we can unpost a payment and apply it to a different customer/invoice in the AR system but we have to remove it out of the AR system completely?

Thanks for any assistance!

Alana Lehr