Account Funding Transactions (AFT) are a type of card Transaction in which funds are transferred from a payment card to another account, such as a digital wallet, a payment account, or a prepaid card.AFT Transactions differ from traditional purchase Transactions because their purpose is not to pay for a product or service but to transfer funds to another account, from which a purchase can be made or currency can be exchanged for another Payment method.For security reasons, card payment networks require additional parameters to be sent for all AFT Transactions carried out by specific types of Merchants.