VIES Error

TECHNICAL_ERROR

Unexpected error during VIES processing

What does TECHNICAL_ERROR mean?

The TECHNICAL_ERROR error is VIES's catch-all for unexpected server-side problems. Something went wrong during request processing that doesn't fit into other error categories.

This is the most opaque VIES error. It tells you almost nothing about what actually happened. The error could be caused by anything from a database connection failure to an unhandled exception in VIES code.

When does this error occur?

  • During VIES infrastructure problems
  • When internal VIES systems fail unexpectedly
  • During database connection issues on the VIES side
  • When VIES encounters bugs or unhandled edge cases
  • After system updates that introduce regressions

Why is this frustrating?

TECHNICAL_ERROR provides no actionable information: - You don't know if your request was valid - You don't know if the VAT number exists - You don't know if retrying will help - You don't know how long the issue will last

It's a black box failure that requires trial and error to work around.

VIES internal failure

TECHNICAL_ERROR indicates something broke inside VIES. Your request is probably fine. The problem is on their end. All you can do is retry and hope.

How to handle TECHNICAL_ERROR

1. Use a service with multiple data sources

VatDB doesn't just wrap VIES. We validate through multiple official EU and national databases. When VIES returns cryptic TECHNICAL_ERRORs, we route around the problem automatically. Use webhooks to get notified when validation succeeds through an alternative source.

2. Retry with backoff

TECHNICAL_ERROR can be transient. Implement retry logic with exponential backoff, starting with 2 seconds and doubling on each attempt.

3. Handle gracefully

For production systems, have a fallback strategy. Queue for later validation if immediate validation fails.

Escape the VIES black box

VatDB doesn't just wrap VIES. We validate through multiple official EU and national databases. When VIES returns cryptic TECHNICAL_ERRORs, we route around the problem automatically. Use webhooks to receive results asynchronously. Get results, not error codes.

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Frequently Asked Questions

Is there anything I can do to prevent TECHNICAL_ERROR?
No. TECHNICAL_ERROR is caused by internal VIES problems, not your request. You can only mitigate it with retries, timeouts, and fallback strategies, or use a service like VatDB that handles this automatically.
How long do TECHNICAL_ERRORs typically last?
It varies wildly. Sometimes it's a one-off glitch that resolves on the next request. Sometimes it indicates a broader outage lasting hours. Monitor and retry to determine the scope.
Should I report TECHNICAL_ERRORs to the EU?
You can, but response is typically slow. For persistent issues affecting many users, the EU eventually becomes aware through aggregate monitoring. For one-off errors, reporting rarely helps.
How does VatDB handle TECHNICAL_ERROR?
VatDB treats TECHNICAL_ERROR as a trigger to try alternative sources. We validate the VAT number through official national databases rather than waiting for VIES to recover. Webhooks notify you when validation completes. You get results without seeing the underlying errors.