How to Verify OEM Spare Parts Authenticity

Why Verifying Authenticity Matters

Using counterfeit or non‑OEM spare parts can lead to unexpected downtime, warranty issues, substandard performance, or even equipment damage. Verifying authenticity is critical to safeguarding investments and operational reliability.

Key Documents and Certifications to Request

Always ask for and verify the following documentation when evaluating OEM parts:

Certificate of Conformity (CoC) / Declaration of Conformity

This confirms the part meets the required standards (e.g. CE, UKCA). Ensure it’s original and signed by the manufacturer.

ISO / Quality Management Certificates

These prove the OEM’s quality processes and consistency. Cross-check the certificate number and validity period.

Batch / Lot / Serial Number Records

Traceability is key. Ask for batch or lot numbers, production dates, and serial numbers to cross-check their history.

Packing & Label Integrity

Inspect packaging for tampering, holograms, seals, and consistent branding. Discrepancies may signal counterfeit goods.

Practical Steps to Ensure Authenticity

• Contact OEM directly to confirm part numbers and verification.
• Use QR / barcode scans to check data (if available).
• Compare with known genuine parts (dimensions, markings, finish).
• Request inspection or lab testing (for critical/expensive parts).

When Authenticity Checks Are Most Crucial

• Critical components where failure may cause production halt
• Industries regulated by safety/compliance standards
• High-value or high-risk parts (long service life, safety functions)

Not sure how to select the right OEM parts in the first place? Read our OEM spare parts selection guide.

How Stern Company Helps You Verify Authenticity

• Supply directly from verified European OEMs
• Provide full documentation for parts (CoC, ISO, batch data)
• Support in audits and custom verification processes