Hello,
Sabi17. Apart from handing over your account to someone else, a practice that is most certainly prohibited once you have received a unique account number, I cannot think of another way to transfer access to those tests. If, on the other hand, you have
not taken the GMAT™ before and only set up an account just in case, you can go into your Profile page, edit the name and e-mail fields, and the new user should then be able to take control. To be honest, I would probably just take the loss. If you wanted to take the practice exams for a lark, they would be there for you at any point down the road. (I would not want to risk incurring the wrath of GMAC™ at any point in my life.)
- Andrew