Learn how to register for an ISTQB exam. Registering for the official ISTQB exam is done through ASTQB’s ISTQB exam provider AT*SQA. AT*SQA lets you take your ISTQB exam at home anywhere in the world – you don’t have to live in the U.S. When you register for your ISTQB exam through AT*SQA, you can appear on both the Official U.S. List of Certified Testers™ used by American employers as well as the ISTQB Successful Candidate Register. This is only possible through AT*SQA because it is the official ISTQB exam provider for ASTQB (ISTQB in the U.S.).