Most states rely on a standard form, but some states require lawyers to design the document. The document also contains a list of contingencies that, if not fulfilled, invalidate the agreement. Chattels are personal belongings that are not attached to the property and can be removed without damage. A sales contract contains a list of default cats. The list can be modified by the buyer or seller to include all the chattels that the parties wish to include in the sale of real estate. As a rule, the buyer`s agent writes the sales contract. However, if they are not legally licensed to practice the law, real estate agents generally cannot create their own legal contracts. Instead, companies often use standardized form contracts that allow agents to fill in the gaps with the peculiarities of the sale. .