A Certificate Authority will use a CSR to create your SSL certificate.
What is a CSR? A CSR or 'Certificate Signing Request' is a block of encrypted text, that is generated on the server that the certificate will be used on.
It contains information that will be included in your certificate, such as your organization name, common name (domain name), locality, and country. It also contains the public key that will be included in your certificate.
Run these OpenSSL commands, to decode your Certificate Signing Request, and verify that it contains the correct information.