Maryland Code, Real Property § 7-105.12

(a)(1) In this section the following words have the meanings indicated.

(2) “Bona fide tenant” means a tenant under a lease or tenancy described in § 7-105.8(b)(1) of this subtitle.

(3) “Foreclosure sale purchaser” means any purchaser at a foreclosure sale of a mortgage or deed of trust on residential property.

(4) “Residential property” has the meaning stated in § 7-105.1(a)(12) of this subtitle.

(1) Conducts a reasonable inquiry as required under Maryland Rule 14-102 into:

(2) Serves on each bona fide tenant, by first-class mail with a certificate of mailing a notice that:

(c)(1) Except as provided in paragraph (2) of this subsection, a foreclosure sale purchaser waives any claim to rent payments from a bona fide tenant in possession of a residential property for any period of time before the purchaser satisfies the requirements under subsection (b) of this section.

(2) A foreclosure sale purchaser does not waive any claim to rent due and payable for use of the residential property for the 15 days immediately prior to the date that the purchaser satisfied the requirements under subsection (b) of this section.