@Mike Alverd and @Kashaela Mullanix Their is a bit of a difference, if you find a house and the numbers are right you can basically make an offer to purchase, but you don't you sell the contract at a nominal higher price, Then you're a wholesaler, a fancier title then birddogging lol in which you find the property/motivated seller etc etc then find a buyer/Investor to purchase the property. To be a little blunt though, in some States if an investor does a certain amount of sales in a year then yes he/she does have to have a license. But in most States, no you do not need a license to either work as an Investor or a Wholesaler. As an Investor you're buying the house basically for yourself, you're the owner of said house, then you fix it up to resell it, you find the buyer you sell it, but personally I think I would rather get a Real Estate Agent to do the selling for me, I would have Qualified Buyers to purchase my investment. I am still learning how a Wholesaler works so I can not answer the part of an Wholesaler, but I am sure there are people who are more versed in that aspect then I am can answer that.
Here in Washington State, if I, the Real Estate Investor, buys a property to do a Fix and Flip, even if I don't do the work on the property but hire General Contractors to do the work, I still need a General Contractors License (which is only $113 for two years) as well as being Bonded and Insured. New Law they just past not to long ago, but no Real Estate Agent License. I already have a full time job or I would go get my RE Agent License seeing its been since the mid to late 90's that I held one, still can't get a Brokers license lol..