Section 4--203. Effect of Instructions.

Subject to the provisions of Article 3 concerning conversion of
instruments (Section 3--419) and the provisions of both Article 3 and
this Article concerning restrictive indorsements only a collecting
bank's transferor can give instructions which affect the bank or
constitute notice to it and a collecting bank is not liable to prior
parties for any action taken pursuant to such instructions or in
accordance with any agreement with its transferor.