It is very important that you keep your mystery shopping paperwork for several months after you have finished a shop. You need to keep the questionnaire and the receipt! Just yesterday, I had two inquiries on two different shops I had completed. One had been done over this past weekend. I found the paperwork and answered the follow up questions they sent me. The other one had been done back in early July, and again, I found the paperwork and answered the questions. This doesn't happen to often, but when it does, you want to have that paperwork. I do way too many shops, to keep all of that information in my head!
