: Special Offer! Total 4 active m Promotion Codes Deals are listed and the latest one is updated on August 03, 2018; We do not guarantee the authenticity of m coupon or promo code. Retailers will need to manually verify the product purchase requirements and key enter the coupon value into their Point-of-Sale (POS) system in the event of a non-scannable bar code.But many have variable length. The new coupon code can have a dozen fields with total length no more than 70 digits. Note, the remaining of this section is not shown. Expired 10, might still work. Barcode Requirement, gS1 DataBar Expanded symbology should be used to print coupon barcodes. The nominal X-dimension for this application shall.0130 inch (0.33 mm). The coupon codes will adjust your order total. After you come up the data encoded, use. Data Field 1: Second Purchase Qualification. For variable length fields, the columns Min and Max list their length range.