Download the PDF version of the membership form How do I become a member of CDBA?Becoming a member is very easy; you may either download a copy of our membership form to the left or complete the membership form online.Once completed, please mail/fax/scan and e-mail your form to our main office.Memberships may be paid by cash, cheque, credit card or e-transfer. Did you know? CDBA National has over 150 members nationwide and across all provinces, each contributing to the deafblind community.