DC Code § 28:3-117 (2021)
2021 District of Columbia Code|Title 28 - Commercial Instruments and Transactions. [Enacted title]|Subtitle I - Uniform Commercial Code|Article 3 - Negotiable Instruments|Part I - General Provisions and Definitions|§ 28:3-117. Other agreements affecting instrument

Subject to applicable law regarding exclusion of proof of contemporaneous or previous agreements, the obligation of a party to an instrument to pay the instrument may be modified, supplemented, or nullified by a separate agreement of the obligor and a person entitled to enforce the instrument, if the instrument is issued or the obligation is incurred in reliance on the agreement or as part of the same transaction giving rise to the agreement. To the extent an obligation is modified, supplemented, or nullified by an agreement under this section, the agreement is a defense to the obligation.  (Dec. 30, 1963, 77 Stat. 677, Pub. L. 88-243, § 1; Mar. 23 1995, D.C. Law 10-249, § 2(d), 42 DCR 467.)  Prior Codifications 1981 Ed., § 28:3-117. 1973 Ed., § 28:3-119. Uniform Commercial Code Comment 1. The separate agreement might be a security agreement or mortgage or it might be an agreement that contradicts the terms of the instrument. For example, a person may be induced to sign an instrument under an agreement that the signer will not be liable on the instrument unless certain conditions are met. Suppose X requested credit from Creditor who is willing to give the credit only if an acceptable accommodation party will sign the note of X as co-maker. Y agrees to sign as co-maker on the condition that Creditor also obtain the signature of Z as co-maker. Creditor agrees and Y signs as co-maker with X. Creditor fails to obtain the signature of Z on the note. Under Sections 3-412 and 3-419(b), Y is obliged to pay the note, but Section 3-117 applies. In this case, the agreement modifies the terms of the note by stating a condition to the obligation of Y to pay the note. This case is essentially similar to a case in which a maker of a note is induced to sign the note by fraud of the holder. Although the agreement that Y not be liable on the note unless Z also signs may not have been fraudulently made, a subsequent attempt by Creditor to require Y to pay the note in violation of the agreement is a bad faith act. Section 3-117, in treating the agreement as a defense, allows Y to assert the agreement against Creditor, but the defense would not be good against a subsequent holder in due course of the note that took it without notice of the agreement. If there cannot be a holder in due course because of Section 3-106(d), a subsequent holder that took the note in good faith, for value and without knowledge of the agreement would not be able to enforce the liability of Y. This result is consistent with the risk that a holder not in due course takes with respect to fraud in inducing issuance of an instrument. 2. The effect of merger or integration clauses to the effect that a writing is intended to be the complete and exclusive statement of the terms of the agreement or that the agreement is not subject to conditions is left to the supplementary law of the jurisdiction pursuant to Section 1-103. Thus, in the case discussed in Comment 1, whether Y is permitted to prove the condition to Y’s obligation to pay the note is determined by that law. Moreover, nothing in this section is intended to validate an agreement which is fraudulent or void as against public policy, as in the case of a note given to deceive a bank examiner.