Md. Code, Tax - Property § 14–873

(a) In this part the following words have the meanings indicated.

(b) “Interested party” means:

(1) the person who last appears as owner of the real property on the collector’s tax roll;

(2) a mortgagee of the property or assignee of a mortgage of record;

(3) a holder of a beneficial interest in a deed of trust recorded against the real property;

(4) a taxing agency that has the authority to collect tax on the real property; or

(5) any person having an interest in the real property whose identity and address are:

(i) reasonably ascertainable from the county land records; or

(ii) revealed by a full title search consisting of at least 50 years.

(c) “Tax” has the meaning stated in § 14–801 of this subtitle.