Getting property assigned from motivated seller

[Ravin Scott]

I am a bit confused about an assigment of real estate contract. If I am assigning a property from a motivated seller do I need to fill out an assignment contract or a purchase agreement.

In all the tutorials and information I am reading on wholesaling seems like they are giving information on assigning the contract between the wholesaler and the end buyer.

What do I need for to get a property assigned from a motivated seller before I find someone to buy the property?