Participants involved in an Amazon FPS transaction perform one or more of the following actions:
The buyer, known as the sender in an Amazon FPS transaction, makes the payment for purchasing goods or services.
The merchant (or seller), also known as the recipient in an Amazon FPS transaction, receives payment for the goods or services sold to the sender.
Make Amazon web service calls to enable money transfer
The developer, also known as the caller in an Amazon FPS transaction, can transfer money between a sender and a recipient in a transaction. A caller can also perform the role of a sender or a recipient. A caller must have an AWS account as well as an FPS developer account. For information about getting your accounts, see Getting Set Up.
Amazon FPS does not allow a participant to be both the sender and the recipient in a transaction.