# When validation is unavailable

Temporary KoSIT or authoritative validation outages do not automatically mean the invoice data is wrong.

## What you may see

- Authoritative validation is temporarily unavailable
- KoSIT validation unavailable
- Validation service unavailable
- Validation proof unavailable

## What this means

Invoice Converter can run local checks, but final XRechnung-style validation may depend on an authoritative validator service. If that service is starting, unhealthy, or temporarily unreachable, the page may pause the final validation gate.

## What to do

- Fix any visible invoice data errors first.
- Wait a short time and run validation again.
- For production e-invoices, wait for validation to pass before sending the file to a buyer or portal.