Working with wholesalers

[Misty James]

Hello Everyone. I am looking at working with my first wholesaler to acquire a property (by way of a tip sent to me by a friend on fb). The wholesaler's page is general directed towards RE. The wholesaler is requesting pof as a way to prove that I'm serious. I've never acquired property this way, so is this normal procedure for wholesalers? Is there anyway to verify the wholesalers credentials? I believe I read somewhere that they do not have to be licensed real estate agents, so before I get caught up, is there a way to determine that they are on the up and up? 

Thanks in advance.