Here's the situation: I have a sizable apple store credit after returning an iPad 2. The Apple Store issued a store credit because I did not have the receipt. I would like to sell that store credit, probably for a little less than face value. NOTE: I have not scratched the PIN number off the back. Here are the questions: 1. Can someone else spend my store credit (after they buy it from me)? 2. If I sell the store credit to a stranger, is there a way to safely do this? I don't want to get ripped off and I want to buyer to feel comfortable too. 3. Can the store credit be verified without scratching off the PIN on the back? Thanks!