Specifications include, but are not limited to: The successful vendor must agree to mark shipments and invoices with a purchase order. Shipment must be delivered prepaid to the coop member location indicated on the purchase order, unless otherwise specified. Packing lists are to accompany the shipment in a container/carton properly marked as PACKING LIST for distribution to the coop member with the material. The successful vendor shall agree that all items shipped in error, such as incorrect colors, etc. will return by freight collect and the items will be replaced at no extra cost. Notification of concealed shortages reported by the coop members are to be accepted by the vendor and items reshipped at no cost to the coop member. No charge packing list marked with the applicable purchase order number shall be enclosed with each “no charge” shipment.