Hi @cosmicdave
Apologies, your earlier reply seems to have slipped past me!
If it was just one transaction that was marked as an overpayment, you can just refund the balance - there wouldn’t be a need to raise a credit note unless your crediting an invoice.
There’s a previous post that highlights how to do this (here: Refund client overpayment). As you refund it, it will create a pre-tagged entry in your bank statement, so you can delete any untagged duplicate entries.
If it’s split across multiple payments, then it would mean it’s a little bit more complicated, as each one would have to be refunded individually.
Hope that makes sense?