Barcode verification is the process of grading barcodes. Barcode verifiers are precision instruments which enable the verification process. Barcode verifiers grade 1-D and 2-D barcodes according to quality parameters defined by industry standards which are developed by international organizations like ANSI/ISO and industry groups like GS1 and HIBCC. Verification helps confirm that a code being produced will be accepted anywhere, by any reader. It is the only way to formally assign a grade to a barcode, as well as the most reliable way to diagnose and fix marking errors.