What this EU catalog identifier checker reviews
Prepare catalog data for identifier-focused review without handing your spreadsheet to a remote service. The checker maps your columns, flags missing or placeholder values, validates supported barcode formats and explains every finding.
- SKU / M-PID presence and duplicates
- Manufacturer reference / NS-PID presence and duplicates
- GTIN, EAN, UPC and ISBN format and check digits
Scope and regulatory boundary
From 1 November 2026, the EU customs data changes covered by this tool apply to postal consignments transported under the Universal Postal Union framework and require item-level product identification data in the applicable electronic customs data. Scope and implementation can depend on the operator, product and data flow, so uncertain cases are labelled “Needs regulatory verification”.
This tool does not certify customs compliance, determine shipment eligibility or guarantee customs clearance. Review actual shipment requirements with the responsible carrier or adviser.
How to use the checker
- Export a CSV or XLSX file with clear column headings.
- Upload it in the browser and confirm the automatic mapping.
- Scan, review every explanation, and correct values only from trusted source records.
- Re-run validation and export a corrected copy for further review.