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trustlab-docs/pages/guide/certificates/renewal.en.mdx

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# Renewal Process
Certificates expire to ensure security rotation. TrustLab simplifies the renewal process so you don't experience downtime.
## When to Renew
You will receive an email notification:
- **30 days** before expiration.
- **7 days** before expiration.
- **1 day** before expiration.
## How to Renew (Manual Re-issue)
To renew a certificate, you simply generate a fresh one with the same domain name.
1. Go to **Certificates** and click **"Generate New"**.
2. **Identity**: Enter the **same Common Name (CN)** as your expiring certificate.
3. **Generate**: The system will issue a new certificate with a fresh validity period.
4. **Replace**: Download the new `.crt` (and `.key` if you didn't reuse the CSI) and replace the files on your server.
> [!NOTE]
> The old certificate will remain valid until it expires naturally. You can safely delete it after verifying the new one works.
## What Happens Next?
- A **new certificate** is generated with a new validity period.
- The **Private Key** remains the same (if "Reuse Key" was selected) OR a new key is generated (recommended).
- The old certificate remains valid until its original expiration date (unless revoked).
> [!IMPORTANT]
> You must **download and install the new certificate** on your server. Renewal **does not** happen automatically on the server side unless you use our ACME integration.