Are you a Canadian carrier interested in joining CST-GA or a Certification Authority interested in becoming authorized to issue STI certificates in Canada? Contact us or complete the form below.


Any Canadian Carrier with a current year DCS and direct access to Canadian Telephone Numbers can participate in the call authentication scheme. Any entity wishing to submit a CPS and become an authorized Certification Authority submit your CPS using the Form below.

For more information, please contact us.

See if you are eligible to join
Submit my CPS

Am I eligible to join the CST-GA?

Please complete the form below to find out if you are eligible to become a member of the CST-GA. Required*

Become an authorized Certification Authority

Please review the CST-GA Certificate Policy, complete the form below and then submit your Certificate Practice Statement (CPS). Required*.

  • Accepted file types: doc, docx, pdf, Max. file size: 256 MB.


Contact Us

If you have a question or would like to learn more information about the CST-GA , please do not hesitate to reach out.