MMLS? Checking credentials of lenders?

[Brenda Whittaker]

Ive asked before and cant find it.  How do I do due diligence on lenders?  What is that MMLS  is that a regulatory agency and what does it stand for?   Ive heard here both that lenders have to be part of it and I;ve heard the opposite, that they dont.  what is it and how do I check if a lender is legit>>