While never trying it with an iPad, I've had success returning xbox/ps3 to local walmart and target stores without receipts. Certain electronic items require receipts, but depending on the guy behind the counter, you might luck out. For instance, I tried to return a memory card, and Walmart would not take it without a receipt, but Target did. They give store credit, and take your ID, so as to track how many of these returns you do. They limit it, I suppose to stop people from stealing from Store A to return to Store B for money.
If you're up in Canada, I'm hoping you got other stores of the sort that you can give it a try with. Just leave it unopened, drive around a bit, and good luck!