: CERTIFICATION OF MATERIAL CONFORMANCE - DATA ITEM DESC.
CERTIFICATION OF MATERIAL CONFORMANCE - DATA ITEM DESC. A Certificate of Material Conformance must accompany each shipment and each invoice on this Purchase Order. This certificate shall identify the company, Purchase Order, item, date, (lot, date, and heat code if applicable). The subcontracted supplies and services, meet all drawings, specifications, and Purchase Order requirements with records of objective evidence on file. The Certificate shall be signed by an authorized representative of seller.