Céline - does this mean 'un avoir' will be added? It is the direct translation of 'credit note' according to Larousse bilingual online, and is illustrated with a shopping example. In my part of the world, «un bon d'achat» seems more in keeping with 'gift voucher/card' so not quite the same meaning to me as a credit. (We don't use credit note in this context - it is almost exclusively an accounting/business term here).