Thank you for the warning. I live in CA and will be sure to find out about that because I don't want any more obligations.
Also, I don't plan on doing more than 1 - 2 shops per week. So far the shops I've done were spread out among different Mystery Shops. Do you think at this rate I'll simply be able to bypass giving these companies my SSN/TIN? Or, do most companies require you to give them your SSN/TIN in order to get paid, even below $600 a year?
I'm currently signed up with 6 MS and have only given my SSN to Market Force. Although, one other company I have a shop lined up to do in a couple weeks requires SSN/TIN Verification before I can get paid.