Indorsement of orders

§ 5104. Indorsement of orders The payee of a money order, by his written indorsement thereon, may direct it to be paid to any other person who shall be entitled to payment upon furnishing such proof as the Postmaster General requires that the indorsement is genuine, and that he is the person named therein. More than one indorsement renders an order invalid. The holder of such an order, if otherwise entitled thereto, may obtain payment under such application and proof of the genuineness of the indorsements as the Postmaster General requires.