Authentication of writings ensures a document is proven genuine so it meets foundational admissibility requirements. Authentication requires proof that a writing is the instrument its proponent claims, either by evidence sufficient to sustain that finding or by other lawful means. It includes attestation by proper officers and acts identifying an instrument. Certain writings are self authenticating, such as notarised deeds, certified public records, and officially printed statutes, and thus may be received without further proof, satisfying the foundational admissibility requirement.