Md. Code, Commercial Law § 4-203
§4–203.
Subject to Title 3 concerning conversion of instruments (§ 3-420) and restrictive indorsements (§ 3-206) only a collecting bank’s transferor can give instructions that affect the bank or constitute notice to it, and a collecting bank is not liable to prior parties for any action taken pursuant to the instructions or in accordance with any agreement with its transferor.