So I had been told that putting siblings on one receipt didn't matter but now I have learned that it does. I had already issued the parents the receipt with both children on one. I have emailed them since and told them to return it to me so I can reissue a new receipt. How do I document this so that I don't get screwed? Include a copy of the email for my records? I guess I am wondering if they will submit a copy of my original receipt and now the new one (making it also look like I earned way more). I am not going to give them a new one without getting the old one back but I worry about them making a copy.