D.C. Mun. Regs. tit. 9, r. 9-609
If the grantee named in a recorded deed upon which the applicable tax has been paid acted as a nominal grantee for the sole purpose of holding, on behalf of another person, naked title to the property described in the deed, a deed to that property subsequently executed by the nominal grantee, without consideration, naming as grantee the person on whose behalf the nominal grantee acted, shall be exempt from tax as a deed which, without additional consideration, confirms, corrects, modifies, or supplements a deed previously recorded.
If the owners of an estate in real property have, for the sole purpose of changing their estate (for example, in the case of a change from a tenancy in common to a joint tenancy) executed a deed to a nominal grantee holding naked title to the property, who, in turn, and without consideration, executes a deed to the same owners so as to effect the change of estate desired, the deeds so executed shall be exempt from tax as deeds which, without additional consideration, confirm, correct, modify, or supplement a deed previously recorded.
If an exemption is claimed under this section, the right to the exemption must be established to the satisfaction of the Deputy Chief Financial Officer upon the presentation to the Deputy Chief Financial Officer of such returns, documents, and other information that the Deputy Chief Financial Officer, in his or her discretion, may require.
D.C. Mun. Regs. tit. 9, r. 9-609