Is a credit card slip a receipt?
Yes, if it provides full details of the name of the supplier, date of purchase, amount of purchase and full description of the item purchased. Where the customer copy of a manually processed credit card payment, or the receipt issued from a point of sale machine does not include a full description of the item purchased, then it will become a valid receipt if the supplier (not you) writes sufficient details on the receipt to describe the nature of the goods or services supplied.