Md. Code, Real Property § 14–607

(a) An answer to a complaint under this subtitle shall be verified and shall set forth:

(1) Any claim the defendant has to the property that is the subject of the action;

(2) Any facts tending to controvert any material allegations of the complaint that the defendant does not wish to be taken as true; and

(3) A statement of any new matter constituting a defense.

(b) If the defendant disclaims any interest in the title of the property in the answer or allows judgment to be taken without answer, the plaintiff may not recover costs.