Before you can get started with Amazon Simple Pay, you must have an Amazon Payments business account so you can receive payments by credit card. You also need an Amazon Payments Sandbox account to test your buttons.
1.Signup For a Amazon Payments Business Account (To be created by the Business Owner)
2.Signup For an Amazon Payments Sandbox Account (To be created by the Testing Team)
Information to get signed up:
Social Security Number : 518-01-0001
3.Create HTML Code for the Payment Button
Fill the Form and get the HTML code and paste it on your Website.