Yes. We are the library police.
AML software triggered an alert for a possible MRB. This is all they have done up to this point; purchase instructional guides/videos for investing in MRBs.
I found the Tier 1,2,3 descriptions from ACAMS. In my situation, although it's a commercial business making the purchase, it seems they are just a consumer and not a Tier 2 or 3 service provider to a MRB.