Translator certification in certain language pairs is awarded by

• The American Translators Association (ATA), based on a rigorous written examination in a specific language combination, such as Spanish into English. This was called an accreditation until 2003, when the ATA changed the terminology.

Interpreter certification in certain languages is offered by

• the federal court system, which requires both a written and oral examination
• the New Mexico court system, which requires a two-day workshop and examinations in simultaneous, consecutive and sight interpretation.

Other entities have programs for qualifying individuals to supply linguistic services:

• the Federal Bureau of Investigation (FBI)
• the US State Department
• other state court systems
• many foreign governments

Accreditation and certification are reassuring indicators of proficiency for the client but are not available in many language combinations. Education and experience are also important.