Where applicable, loan documentation will include a deed of trust or mortgage, promissory note, closing statements, and relevant disclosures. Learn More About The Elements of Breach of Promissory Note in Texas and How a Borrower May Be Liable for Breach of a Note.Find top rated promissory note lawyers for Dallas, TX to hire. Post your legal needs and get proposals from TX financial lawyers. As the buyer, be prepared to review and sign a large variety of documents related to your loan, and to pay the closing costs. Notices of all properties to be sold are posted on the County Clerk's the web site. It's a written legal document you'll sign to promise you will repay the company what it lends you to buy your home. Typically, there are three legal documents needed for seller financing: Promissory Note – This document is the Buyer's promise to pay for the property.