07 August 2015
You are seller. So the customer is YOUR debtor. The debtor is indebted to you. Inadvertantly you debited debtor's account with 3 % in place of 13.5 %. So? You need to debit debtor's account by this shortfall of 13.5 - 3 = 10.5%
So you will write a letter to the debtor about your error. This letter in commerce parlour will be called as Debit Note raised by seller.OK?
07 August 2015
A debit note or debit memorandum (memo) is a commercial document issued by a buyer to a seller as a means of formally requesting a credit note. A seller might also issue a debit note instead of an invoice in order to adjust upwards the amount of an invoice already issued (as if the invoice is recorded in wrong value
07 August 2015
A credit note or credit memorandum (memo) is a commercial document issued by a seller to a buyer. The seller usually issues a credit memo for the same or lower amount than the invoice, and then repays the money to the buyer or sets it off against a balance due from other transactions.
or
a receipt given by a shop to a customer who has returned goods, which can be offset against future purchases.