A system and method of providing receipt data for a payment transaction through a transaction receipt portal system are described, in which receipt data is stored for a completed payment transaction received from a remote merchant system, the receipt data being associated with a customer and a merchant registered with the system, and stored receipt data is provided to the associated registered customer or merchant. A card payment transaction involves receiving, by a computing device, an electronic receipt from the merchant system, the electronic receipt including data for retrieving stored receipt data from the transaction receipt portal system.