Writing your own contracts is perfectly possible, and legal. But it's also an incredibly bad idea. There's two reasons for this: Property law is complicated. Because it's such a fundamental part of legislation, it's often lots and lots of different laws layered on top of each other.
time showing agreement is a contract between a real estate seller and an agent who does not represent the seller but has a potential buyer interested in viewing the property. This document grants the agent the right to show the property to the interested buyer for a single occasion.
As public records, contract forms adopted by the Texas Real Estate Commission are available to any person. Real estate license holders are required to use these forms. However, TREC contract forms are intended for use primarily by licensed real estate brokers or sales agents who are trained in their correct use.