Representing oneself. Serving as one's own lawyer.
Source: U.S. Courts
Used to designate an independent inventor who has elected to file an application by themselves without the services of a licensed representative.
Source: U.S. Patent and Trademark Office.
When a party represents themselves in a legal matter.
Source: Office of Child Support Enforcement
Refers to persons that present their own cases in court without lawyers; from the Latin for "on one's own behalf."
Source: California Courts.