Md. Code, Alcoholic Beverages and Cannabis § 26–405

(a) (1) A cash deposit for a returnable container shall be required at the time of sale or delivery of beer.

(2) For purposes of construing § 2–215 of this article:

(i) a check accepted for payment that is not postdated and is promptly deposited for collection is considered cash; and

(ii) a check that is given in payment for alcoholic beverages to a holder of the license, and is returned uncollected, is prima facie evidence in a civil case of a violation of this section or § 2–215 of this article.

(b) A person who violates this section is guilty of a misdemeanor and on conviction is subject to imprisonment not exceeding 6 months or a fine not exceeding $500 or both.