A Return Authorisation (RA) number is required for replacement Products and refunds. Where Customer Service has provisionally determined that a Product is DOA, DSAA or LD, Customer Service will issue you with an RA. Products cannot be returned without an RA. The Product should be returned to Zone Medical within 30 calendar days of the issuance of the RA. Where possible, all Products must be packed in the original, unmarked packaging including any accessories, manuals, documentation and registration that shipped with the Product.