- Validate the number — GTIN validator
- Check quiet zones and print quality (smudges, low contrast)
2.1. Purchasing a barcode verification test from a barcode service provider will reveal if there are issues with the print quality of the barcode - Test colours — legibility simulator
- Confirm symbology matches data (EAN-13 vs UPC vs ITF-14)
- Scan a test print on the actual packaging material
5.1. Edges if the bars should appear sharp. Compression artefacts from low resolution raster images can cause bars the be blurred, altering the bar width and causing invalid scans - In a retail environment, ensure the product information has been entered into the retailer’s product database/point-of-sale system
See also packaging artwork checks.