Add sale and credit notes. The difference between a sale and a credit note is the receipt_type_code which is a required field. A sale has a receipt type code of S while a credit note has a receipt type code of R. When adding a credit note, the original invoice number is required. For a Sale: receipt_type_code is "S" For a Credit note: receipt_type_code is "R" and original_invoice_number is required. Note: original_invoice_number is a numeric value (This should be an existing eTIMS invoice number of the sale invoice you intend to credit) Note: trader_invoice_number should be unique, unless you deactivated the sale or the sale queue_status is "failed".

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