Different routes available (not the same as a Certificate of Attendance after completion of a CBT related course) 

Options:

Beck institute https://beckinstitute.org/

 A-CBT https://www.academyofct.org/

BABCP (UK citizens), certain EABCT country members

CBTASA Accreditation:

Subject to accreditation by the EABCT as a credentialing body. Long term goal of the CBTASA