Maryland Code, Commercial Law § 12-911

(a) If a borrower defaults under the terms of a plan and the credit grantor refers the borrower's account to an attorney who is not a salaried employee of the credit grantor for collection, the credit grantor may, if the agreement governing the revolving credit plan permits, charge and collect from the borrower a reasonable attorney's fee.

(b) If the agreement governing the revolving credit plan permits, the credit grantor may recover from the borrower all court or other collection costs actually incurred by the credit grantor relating to the borrower's default.