# Webhook Delivery Issues

Fix signature mismatches, timeout failures, and endpoint availability problems.

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Source: https://learning.monetizekit.app/docs/troubleshooting/webhook-issues
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• Signature mismatch: verify HMAC secret and raw body usage — see [Webhook Verification and Retries](/docs/guides/webhooks) for the exact signing scheme.

• Timeout: reduce handler latency or queue work asynchronously. • Endpoint unreachable: validate DNS, TLS chain, and firewall allowlists.