The present subject matter relates to a computer-implemented method for generating a receipt number. The computer-implemented method includes generating a receipt number generation request in response to transaction involving an item to be purchased, wherein the generating is based at least on input data. The computer-implemented method further includes obtaining the receipt number based on the receipt number generation request and one or more predefined rules. In one implementation, the receipt number is indicative of a mode field, a receipt type field, a format type field, a store number field, a till number field, and a transaction number field.