The original of this assignment, properly executed, must be filed in the TSSWCB office. 2. Today's video is focusing on the paperwork specifically the assignment agreement between you and your cash buyer.Once you go into a purchase and sale agreement with your seller you need an assignment agreement to assign that to your end buyer. In this video I'm going to do the boring thing and show you exactly how to fill these documents out. This easy-to-use form lets you transfer money or property owed to you to another person. All contract assignments must be completed according to these guidelines. Include your original document and remit a cashier's check or money order made payable to Teneshia Hudspeth, Harris County Clerk.