D.C. Code § 1-1204

Seal

Mar. 3, 1901, 31 Stat. 1279, ch. 854, § 562

Each notary public shall provide a notarial seal with which he shall authenticate all his official acts.

Official source: D.C. Law Library (Council of the District of Columbia). Reproduced from public-domain District of Columbia statutes; confirm against the official source for the current text. Not legal advice.