District of Columbia Procedural Requirements
An attachment may be issued upon a judgment either before or after or at the same time with a fieri facias. If costs are unnecessarily multiplied thereby they shall be charged to the party causing the attachment to be issued. D.C. Code § 16-542.
An attachment shall be levied upon credits of the defendant, in the hands of a garnishee, by serving the garnishee with a copy of the writ of attachment and of the interrogatories accompanying the writ, and a notice that any property or credits of the defendant in his hands are seized by virtue of the attachment. D.C. Code § 16-546.
Where the property or credits attached or sought to be attached are held by the garnishee in the name of or for the account of a person other than the defendant, the garnishee shall retain the property or credits during the period pending determination by the court of the propriety of the attachment or the rightful owner of the property or credits. During that period the garnishee shall incur no liability whatsoever for the retention. D.C. Code § 16-547.
The court may make all orders necessary for the preservation of the property attached. D.C. Code § 16-550. In any case in which a writ of attachment is issued, the plaintiff may submit interrogatories in writing, in such form as may be allowed by the rules or special order of the court, to be served upon any garnishee, asking about any property of the defendant in his possession or charge, or indebtedness of his to the defendant at the time of the service of the attachment or between the time of service and the filing of his answers to the interrogatories. The garnishee shall file his answers, verified by a written declaration that the answers are made under the penalties of perjury, to the interrogatories within ten days after service upon him. In addition to the answers to written interrogatories required of him, the garnishee may, on motion, be required to appear in court and be examined orally, under oath, touching any property or credits of the defendant in his hands. D.C. Code § 16-552.
If a garnishee answers to interrogatories that he does not have property or credits of the defendant, or has less than the amount of the plaintiff's judgment, the plaintiff may traverse the answer as to the existence or amount of the property or credits, and the issue thereby made may be tried as provided by § 16-551. In such a case, where judgment is rendered for the garnishee, the plaintiff shall be adjudged to pay to the garnishee, in addition to the taxed costs, a reasonable attorney's fee. If the issue is found for the plaintiff, judgment shall be rendered for him in accordance with the finding. D.C. Code § 16-553.
If a garnishee has admitted credits in his hands, in answer to interrogatories served upon him, or the credits have been found upon an issue made, judgment shall be entered against him for the amount of credits admitted or found, not exceeding the amount of the plaintiff's judgment, and costs, and execution shall be had thereon not to exceed the credits in his hands. When the credits are not immediately due and payable, execution shall be stayed until they become due. When the garnishee has failed to answer the interrogatories served on him, or to appear and show cause why a judgment condemnation should not be entered, judgment shall be entered against him for the whole amount of the plaintiff's judgment and costs, and execution may be had thereon. D.C. Code § 16-556.
Interest Rate at which Judgments
Accrue In an action in the United Statutees District Court for the District of Columbia or the Superior Court of the District of Columbia to recover a liquidated debt on which interest is payable by contract or by law or usage the judgment for the plaintiff shall include interest on the principal debt from the time when it was due and payable, at the rate fixed by contract, if any, until paid. D.C. Code § 15-108.
In an action to recover damages for breach of contract the judgment shall allow interest on the amount for which it is rendered from the date of the judgment only. In an action to recover damage for a wrong the judgment for the plaintiff shall bear interest. D.C. Code § 15-109. The rate of interest is 70% of the rate of interest set by the Secretary of the Treasury pursuant to § 6621 of the Internal Revenue Code of 1986 for underpayments and overpayments of tax to the Internal Revenue Service, rounded to the nearest full percent, or if exactly 1/2 of 1%, increased to the nearest full percent. D.C. Code § 28-3302.

