Hi,
A customer paid an invoice twice, albeit the second payment was for an incorrect amount.
They asked for a credit note as they will allocate to a future invoice and pay the difference.
I sent a credit note, they paid the balance of the new invoice minus the credit amount.
I am now confused as to how I allocate the original over payment and how to apply the credit.
I tried a few things but I am going wrong.
I applied the overpayment say £100 to the new invoice £150 then applied the balance paid £50 to the new invoice.
That leaves the credit unapplied.
Please tell me where I am going wrong. I have gone back and undone the changes.