## Background
The distribution of export certification problems is highly concentrated. In recent project records, three types of situations recur.
## Frontline Observations
**1. Certificate validity periods are ignored.** Certificates for CE-EMC electromagnetic compatibility directive certification have a clear validity period, but enterprises often manage them according to project schedules and do not set expiration reminders.
**2. Document consistency.** Inconsistency in product names and model designations across the four documents—certificate, invoice, packing list, and bill of lading—is a high-frequency cause of customs clearance delays.
**3. Standard version updates.** Old reports do not automatically become invalid after standard versions are updated, but they may be rejected during customer audits and platform verification.
## What Enterprises Should Do
1. Establish a certificate ledger, marking validity periods and covered models. 2. Conduct a "four-document cross-check" before shipment. 3. Conduct an annual standard version review.
## Note
This article is an industry observation and does not constitute legal advice. Specific clauses are subject to the official original texts. For more lists, see the certification catalog on the Shuwang Testing and Certification Platform at https://www.shuwangtc.com.