Many books I've read talk about adding or finding contract with the words "and/ or assigns" in them in order to make your wholesale deal work.  Is this really the best way to go about it?  I feel that this will immediately make the seller distrust you or question your intentions.  What I've heard from a seasoned investor is to simply put "This contract is assignable." somewhere in the contract.  In Real Estate everything is assignable, but specifically putting it into the contract covers you in case the deal goes sour.  I'm wondering what everyone's thoughts are on this?  I have no intention to trick any sellers or to be dishonest with them.  I will be completely upfront  and explain that I'm an investor and explain the possible assignment part of the contract if they are curious.  I just want to go about it in a way that doesn't cause suspicion or make the seller distrust me.  

Thanks for your time!