Overpayment - Ability to change to Credit Note
Convert Overpayment to Credit Note, or treat Overpayment the same as Credit note.
We have a lot of customers who double pay their invoices and several who would like to see what credit they have on their account as they will order again - so don't bother with a refund.
Creating overpayments seems like the most logical thing to do, but the functionality of overpayments is lacking in every way. There is no way to send a pdf version of an overpayment to a customer except for printing a statement. I've upvoted the suggestion to add printing functionality, but that isn't the only problem with them.
A simple solution might be to convert overpayments to credit notes which are much more functional forms of customer credit.

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