D.C. Code § 28-2103: Assignee.

Only a resident of the District of Columbia may be an assignee in an assignment for the benefit of creditors. His assent shall appear in writing in, or at the end of, or indorsed on, the assignment. An assignment is invalid unless acknowledged and recorded within five days after its execution in the land records of the District. A trust created by an assignment shall be executed under the supervision and control of the court having probate jurisdiction.