District of Columbia Code Division VIII. General Laws. § 47-4423. Lien priority.

(a) The lien imposed by § 47-4421 shall not be valid against a bona fide purchaser for value, holder of a security interest, mechanic's lienor, or judgment lien creditor until the lien has been filed with the Recorder of Deeds.

(b) In the case of business property sold, transferred, or assigned in bulk other than in the ordinary course of trade or business, the purchaser shall also be deemed to have notice of taxes owing if the purchaser fails to give timely notice to the Mayor under § 47-4461.

(c) Notwithstanding subsection (a) of this section, the lien imposed by § 47-4421 for tax owing under Chapter 20 or § 47-1812.08 shall be valid against a purchaser, holder of a security interest, mechanic's lienor, or judgment lien creditor regardless of when the lien is filed with the Recorder of Deeds; provided, that the lien shall not be valid against a bona fide purchaser for value of homestead real property.