I get an “Unsupported extensions” or “Bad extensions found in CSR” error message. What to do?

The Certificate Authority may not accept Certificate Signing Requests that contain non-alphanumeric characters.

If the details in the CSR contain symbols other than A-Z, 0-9 and dot, you may receive an error when attempting to activate your certificate.

You should also leave Optional Company Name (Opt Organization) and Challenge passphrase fields empty.

You may check if your CSR is compliant with the requirements using Namecheap CSR decoder or Comodo CSR Checker.

If you are using our in-browser CSR generator that is available for single-domain and Wildcard certificates, there should be no CSR-related errors during activation.