So I signed up for the USB adapter exchange from Apple.com website. It says it will ship within the next 3 weeks. When it arrives, I'm supposed to send them the defective USB adapter. What happens if I do not send it back. They do not have my real address. I'm having it sent to a third party address because I may be out of the country at that time. I used my friends serial code and I did not give them any other identifying information. Will they charge me $29.99? I never supplied a credit card with the exchange.