Purchase documents for any type of real estate transaction are binding legal contracts and should be reviewed by an attorney. The contract may provide for, and some states require, a set “cooling-off” period during which the purchaser may cancel the contract and obtain a refund. The contract may include a non-disturbance clause and/or a non-performance clause. A non-disturbance provision ensures continued use of the unit in the event of default and subsequent third party claims against the developer or management firm. A non-performance protection clause allows the purchaser to retain ownership rights, even if a third party is required to buy out the contract. All promises made by the salesperson should be written into the contract. If not, such provisions will almost certainly be unenforceable in a court of law.