Buying your first wholesale property, how to not get burned?

[Jill Smith]

I have only purchased properties via MLS in the past. I am considering buying my first wholesale investment property purchase. What kind of information about the wholesaler or property do I need to check to ensure I do not get taken advantage of? Do wholesalers have any sort of certificate/license to ensure you are buying from a trustworthy person? What questions should I ask the wholesaler about their business? I know to do my own due diligence on the property. What are the differences when buying off MLS vs wholesalers? Thank you!