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Troubleshooting > Swiss UID failed

Troubleshooting

Swiss UID failed

What you’re seeing: Swiss UID checks fail or return an error.

Check Swiss UID connectivity

First, confirm your server can reach the Swiss UID API:

  1. Go to EU VAT Checker → Dashboard
  2. Find the Environment Status section
  3. Check that Swiss UID reachability shows ✓ 200 OK

Confirm CHE Validation settings

  1. Go to EU VAT Checker → CHE Validation
  2. Make sure Swiss UID validation is enabled
  3. Save your changes if you updated anything

If it keeps failing

  • •Wait and retry (the Swiss UID service may be temporarily unavailable)
  • •Check firewall rules for outbound HTTPS requests
  • •Ask your host to allow https://www.uid-wse.admin.ch/V3.0/PublicServices.svc?wsdl

If the API is reachable but validation still fails, test the exact CHE number format your customer entered and compare it with the accepted formats shown in the Swiss UID settings.