Normally, when we receive the check from the customer who deducted the amount for which we will issue credit note next month, we make a creit note in AR in order to apply this payment. Next month when we issue a credit note through OE, we write a debit note for the same amount. Practically, for the same situation, our AR clerk created an invoice with a negative amount to apply the payment. I couldn't find the new invoice in AR G/L transaction, in G/L batch listing it shows debit AR for that amount. That new created invoice does not show up in that customer's transaction history. I don't know if this works as a credit note by entering a negative amount in an invoice? How the G/L entries will be?