Which checks does the standard audit run?

Missing identifiers, duplicates, normalized collisions, formatting problems, and GTIN structure.

HBN Studio

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Every variant is checked for:
  • Missing SKU (warning) and missing barcode (informational)
  • Exact duplicates — the same SKU or barcode used by more than one variant
  • Normalized collisions — values that differ only by case, spacing, or Unicode normalization
  • Edge whitespace and control characters in SKUs
  • Portable SKU formatting — values beyond Shopify's recommended portable length (16 characters)
  • Barcode structure and GTIN check digits — 8, 12, 13, or 14 digits with a valid GS1 check digit
Non-GTIN barcodes (such as Code 39, Code 128, or ISBN-10) are reported as informational only — they can be valid internal identifiers.