The personal information requested, is for the purpose of filling out the FAA Temporary   8060-4 Form (temporary certificate that you will receive if you pass the Practical Exam. 

Payment can be made using VISA, MasterCard, AmEx (provide card number, expiration date, security code on back of card and billing address if different from address provided above). You can also mail a check in U.S. dollars, drawn on a U.S. Bank.