A refund is when you have charged a payer, and need to cancel the payment and return the funds to the payer. The funds will be returned to whatever payment method (credit card, bank account) that the payer initially used to make the payment
Payment Protocol has helped to make Block Eslip commerce payments smoother and more secure than ever. Now it's easier for wallet developers to implement in their own apps.
Payment Protocol and the refund policy of both PaymentProcessors. Fundamentally, our attacks rely on the merchant’s inability to dis-tinguish if the refund address originated from the same pseudonymous customerthat authorised the payment. As well, these attacks are successful even when allmessages are sent over an HTTPS communication channel.
To achieve a signature solution requires changes to each message sent as part of the protocol. We outline these changes in Figure 9 and explain each message separately before discussing their implications.
systems and the life of a transaction. In this section we will discuss the flow of transactions and other payment system considerations important to all merchants, but especially e-commerce merchants.