Md. Code, Commercial Law § 12–413

Except for a bona fide error of computation, if a lender violates any provision of this subtitle he may collect only the principal amount of the loan and may not collect any interest, costs, or other charges with respect to the loan. In addition, a lender who knowingly violates any provision of this subtitle also shall forfeit to the borrower three times the amount of interest and charges collected in excess of that authorized by law.