Conn. Gen. Stat. § 26-63: Notice of action on license.

Notice of the cancellation, suspension or revocation of any license, registration or permit issued by the commissioner, or the cancellation, suspension or revocation of the privilege to obtain such a license, registration or permit, shall be deemed to have been properly served when such notice is sent to the person so affected by registered or certified mail by the commissioner to the last-known address of record of such person in the office of the commissioner.