Settle Prepayment in payable where amount is returned ?

Hi Experts ,

               We have a prepayment invoice of 3000 .

               supplier gave a standard invoice of 1000 . and returned 2000 back .

    We applied the standard invoice of 1000 .

How do we record this transaction of 2000 ?

                  Just to add that we are using oracle projects with oracle payable .   Currently our user user is creating a standard invoice for the amount 2000  in payable and in invoice distribution

they are giving bank  account in order to refund the amount to bank account .

              Debit Bank

                                CR Liability

             Is this the right way ? Although accounting seems fine , is there any other way to achieve this  ?

    

Best Regards

Nishikant