The GS1 barcode compliance checklist for retail suppliers

Retailers reject barcode artwork for boring, predictable reasons. Almost every rejection comes down to five measurable properties, and all of them are decided long before the file reaches the printer.

1. Use the right symbology EAN-13 is the default for products sold outside North America, UPC-A inside it. GTIN-14 with ITF-14 belongs on outer cases, never on the consumer unit. If a buyer asks for "a barcode", they mean the one that matches the packaging level.

2. Respect the quiet zone The blank margin either side of the symbol is part of the symbol. EAN-13 needs 11 modules on the left and 7 on the right. Designers routinely crop into it because it looks like empty space.

3. Keep magnification between 80% and 200% Nominal size for EAN-13 is 37.29 x 25.93 mm. Below 80% magnification, print gain closes the narrow spaces and scanners start failing at the till.

4. Do not truncate bar height Shortening the bars to fit a cramped panel reduces the number of valid scan paths. If space is tight, rotate the symbol to "ladder" orientation instead.

5. Verify the check digit before printing A single transposed digit turns a valid GTIN into a number that scans cleanly and prices incorrectly. Validate every number, every time.

• Validate the GTIN and its check digit
• Confirm magnification and quiet zones on the final artwork
• Print a proof on the actual substrate, not on office paper
• Scan the proof with a real POS-grade scanner

Get those five right and compliance stops being a negotiation.