---
title: "E02094 — MTLSCRLInvalid"
description: "A certificate revocation list for the client certificate has an invalid signature or is past its next update time."
canonical: "https://bird.com/docs/api/errors/E02094"
---

# E02094 — MTLSCRLInvalid

A certificate revocation list for the client certificate has an invalid signature or is past its next update time.

- **HTTP status**: `401`
- **Type**: `auth_error`
- **Name**: `MTLSCRLInvalid`

## What to do

Make sure the issuing certificate authority signs the revocation list and publishes a new one before its next update time.

## Related

- [Authentication](/docs/api/authentication): API keys, regions, and header format
- [E02xxx — Auth & identity](/docs/api/errors/E02xxx): every code in this range
- [Errors](/docs/api/errors): the full wire contract, status mapping, and error catalog
- [Error handling](/docs/guides/errors): branching on `type` and `code`, validation details, and `vendor_code`

## Related resources

- [Should I use a Bird SDK or call the API directly?](/explained/platform/should-i-use-an-sdk-or-call-the-api-directly) (answer)
- [Build your first integration](/learn/paths/integration) (course)
- [Send your first email](/docs/get-started/send-your-first-email) (docs)

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