legailty of assignments

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So I want to start wholesaling houses but I don't have money to be buying a house and I learned that I can use contract assignments to make money without having to buy a house but in some states its illegal and some its legal. So I read on a article on biggerpockets that I should seek a real estate attorney and ask them if its legal in my state.  another bigger pockets member said that I should contact Alabama State Bar. I'm just looking for advice on what I should do