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Troubleshooting Domain Control Validation

Taking into account the steps involved in DCV, some situations may interfere with certificate issuance and renewal.

​​ Blocked validation URL

If you have issues while HTTP DCV is in place, review the following settings:

​​ DNS settings and records

Check your settings at your authoritative DNS provider to make sure that:

​​ Rate limiting

As mentioned in Certificate authorities, specific CAs may have their own limitations. If you use Let’s Encrypt and receive the error below, it means you hit the duplicate certificate limit imposed by Let’s Encrypt.

The authority has rate limited these domains. Please wait for the rate limit to expire or try another authority.

A certificate is considered a duplicate of an earlier certificate if it contains the exact same set of hostnames.

In this case, you can either wait for the rate limit window to end or choose a different certificate authority.