PRODUCTS RETURNED ON A WARRANTY CLAIM MUST INCLUDE A COMPLETED COPY OF A SERVICE REPORT FORM. A WARRANTY CLAIM CANNOT BE PROCESSED WITHOUT THIS FORM, A COPY OF ORIGINAL INVOICE, BILL OF SALES, OR OTHER PURCHASE DOCUMENT SHOULD BE INCLUDED WITH THE EXECUTED SERVICE REPORT FORM TO ESTABLISH PURCHASE DATE AND PRICE. THE ORIGINAL GREENSTONE SHIPPING CARTON AND PACKING MATERIAL SHOULD ALWAYS BE USED FOR ANY WARRANTY-CLAIM RETURN. SHIPPING DAMAGE BECAUSE OF POOR PACKING WILL NORMALLY PRECLUDED ANY WARRANTY ADJUSTMENT SINCE THE DAMAGE WILL USUALLY MAKE ANY TESTING OR MEASUREMENTS IMPOSSIBLE. PARCEL POST SHOULD NEVER BE USED FOR SHIPMENT OF TUBES. RETURNS ARE NOT ACCEPTED ON NEW AND UNUSED TUBES.