The user interfaces that help you create Amazon Simple Pay buttons ask you to enter a variety of information. Many of the buttons ask for the same information, such as a URL to redirect buyers to once they successfully authorize a payment. Amazon Simple Pay enables you to set default values for many of the button parameter values. Even though you set default values, you can still specify different values when generating the buttons. The values you enter in the user interfaces that create the buttons override the default values.
To configure the default values for your buttons
Click the Your Account tab and log in if prompted.
Click Edit my Account Settings.
The Edit My Account Settings web page displays.
Click Manage Developer and Seller Preferences.
The Developer and Seller Preferences page displays.

Use the following table to help you fill in the text fields or make choices.
| Field | Description | |||
|---|---|---|---|---|
| Header and Footer |
To add your company logo to the upper left corner on all of the Amazon Payment order pipeline pages, select Co-branded header image and enter the URL for the logo image. Adding your logo helps your customers know that while they're paying for their purchases using Amazon Payments, they're still connected to your web site. Your logo is placed on a white background. The image can be no greater than 215 pixels wide by 40 pixels high and the URL must always be available. If there is no logo available when your customers check out (either because there was no logo specified or because the logo URL is not available), the name of your company is displayed. By default, no co-branding is selected. | |||
| Return URL |
Optionally, enter the URL where you want the system to redirect buyers after they authorize the payment, for example, You might want to return your customers to your home page or you might have a special Thank You page set up. If you do not specify a return URL, the default Thank You page from Amazon Payments appears. This means that your customers might not navigate back to your web site. We recommend that you always specify a return URL, even if it's just your home page. | |||
| User Abandon URL |
Optionally, enter the URL where you want the system to direct buyers after they choose not to complete the CBUI web pages, for example, This URL is used when the buyer decides not to authorize the purchase and clicks the Cancel button. | |||
| Subscription Cancellation URL |
Enter the URL to your web site where subscribers can be directed when they try to cancel their subscription on payments.amazon.com. If you do not include a URL, subscribers will only be able to cancel their subscription through the Amazon Payments web site. | |||
| URL for Instant Payment Notification |
Optionally, enter the URL where you host a script to handle Instant Payment Notifications. Instant Payment Notification (IPN) is an HTML POST notification that is sent whenever a payment, refund, or reserved payment completes successfully or fails. You must host your own script to handle IPN notifications. | |||
| Sign the buttons? |
Select this check box if you want the | |||
| Enable Signature 2? |
If you want Amazon to sign your Return URL and IPN responses using signature version 2, select this check box. We recommend you select this option.
|
Click Confirm.