In other words, an assignment clause allows the buyer of a home to sell the place before they take possession of it. In this training video, you'll learn Step-by-Step How to Fill Out an Assignment Contract when Wholesaling Real Estate.For the assignment of a contract, the first step is to have an assignability clause, which is in itself a pretty difficult task. Seller shall sell and convey and Purchaser shall purchase the property, together with all buildings and improvements thereon (collectively the. Essentially, an assignment clause allows the buyer to sell the property before they move in. An assignment sale is usually applied to the pre-construction condominium that has not been registered yet, so no one can take ownership of the unit itself. Some contracts have a real estate contract assignment clause built into them. Parts Authority Partners Real Estate, LLC v.