Feedback on email receipts

I hate having to give my email address to get a receipt. It takes extra time and I don't like giving out my personal information. The funny thing is that they still print a receipt- it just doesn't have the items you bought on it. Ironic. I see on the printed receipt that there's a spelling mistake in my email address and thus I didn't receive an email receipt. Say I need to return an item, how do I do it now?