Section 3. No assignment of or order for future wages other than one subject to the preceding section shall be valid for a period exceeding two years from the making thereof, nor unless made to secure a debt contracted prior to or simultaneously with the execution of said assignment or order, nor unless executed in writing in the standard form set forth in section five and signed by the assignor in person and not by attorney, nor unless such assignment or order states the date of its execution, the money or the money value of goods actually furnished by the assignee and the rate of interest, if any, to be paid thereon. Three fourths of the weekly earnings or wages of the assignor shall at all times be exempt from such assignment or order, and no assignment or order shall be valid which does not so state on its face. No such assignment or order shall be valid unless the written acceptance of the employer of the assignor, and, if the assignor is a married man, the written consent of his wife to the making thereof, are endorsed thereon or attached thereto.