A BDSM contract is a written agreement between dominant and submissive that outlines the details of their relationship. This contract may apply to the entire length of their relationship or to a single encounter. Contracts may detail specific acts, rules, and boundaries that are mutually agreed to during a specified amount of time. BDSM contracts are not legally binding.
More About Contract
The most common type of contract seen in the BDSM community is a slave contract. Slave contracts are an agreement between the master and slave that signify ownership, duties, and responsibilities of both parties. Both parties negotiate the terms and agree on necessary changes before signing. Sometimes contracts cover a specified amount of time and sometimes they denote a lifetime commitment. They can apply to every aspect of a relationship (as in a 24/7 TPE relationship) or to only sexual scenarios.