District of Columbia Code
Part IV - Liability of Parties
§ 28:3–401. Signature

(a) A person is not liable on an instrument unless (i) the person signed the instrument, or (ii) the person is represented by an agent or representative who signed the instrument and the signature is binding on the represented person under section 28:3-402.
(b) A signature may be made (i) manually or by means of a device or machine, and (ii) by the use of any name, including a trade or assumed name, or by a word, mark, or symbol executed or adopted by a person with present intention to authenticate a writing.
(Dec. 30, 1963, 77 Stat. 682, Pub. L. 88-243, § 1; Mar. 23, 1995, D.C. Law 10-249, § 2(d), 42 DCR 467.)
1981 Ed., § 28:3-401.
1973 Ed., § 28:3-401.
1. Obligation on an instrument depends on a signature that is binding on the obligor. The signature may be made by the obligor personally or by an agent authorized to act for the obligor. Signature by agents is covered by Section 3-402. It is not necessary that the name of the obligor appear on the instrument, so long as there is a signature that binds the obligor. Signature includes an indorsement.
2. A signature may be handwritten, typed, printed or made in any other manner. It need not be subscribed, and may appear in the body of the instrument, as in the case of “I, John Doe, promise to pay * * *” without any other signature. It may be made by mark, or even by thumb-print. It may be made in any name, including any trade name or assumed name, however false and fictitious, which is adopted for the purpose. Parol evidence is admissible to identify the signer, and when the signer is identified the signature is effective. Indorsement in a name other than that of the indorser is governed by Section 3-204(d).
This section is not intended to affect any other law requiring a signature by mark to be witnessed, or any signature to be otherwise authenticated, or requiring any form of proof.

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