Are there two amounts showing on your bank statement?
Is the supplier going to or has refunded you the additional amount or are they going to treat it as credit?
The supplier will off set the overpayment against future invoices.
Are there two separate amounts showing on your bank statement or one
Two separate amounts. One I have allocated to the supplier invoice and the other I need to show as a credit balance on the supplier account to off set future invoices against.
You will have to create either a cheque payment or an expense and then create the corresponding supplier credit.