We have a business account that is a convenience/party store. They cash 3rd party checks, under $1000. They also offer a service where they basically extend loans. They have some kind of an agreement with Cash for Checks, LLC, where they cash personal checks, hold the checks until a certain date or when the customer comes back in with a "good" check. The party store receives a quarterly commission from the Cash for Checks business. Does this make them an MSB regardless of the amounts of the checks?
Thank you for any light you can shed on this!!

Not unless they cross the $1,000 threshold.

So it would be the amount of the check plus any fees correct? Should I get a copy of their agreement? Thanks Randy!

It is all based on the amount of cash that is actually exchanged. Copies of agreements are always a consideration in the due diligence process.