Unless displaced by particular provisions of this chapter, the principles of law and equity, including the law merchant, and the laws relative to capacity to contract, principal and agent, estoppel, fraud, misrepresentation, duress, coercion, mistake, bankruptcy, or other validating or invalidating causes supplement the provisions of this chapter.
D.C. Code § 15-912
Uniform Law: This section is based upon § 13 of the Uniform Foreign-Money Claims Act.