Conn. Agencies Regs. § 9-32-9
Telephone canvass or canvass by mail. If, on the basis of either a canvass by mail or a canvass by telephone conducted pursuant to section 9-32 of the general statutes and these regulations, the registrars determine that the name of an elector should be erased from the registry list because of his or her removal from the municipality, they shall proceed as provided in section 9-35 of the general statutes only after having made two (2) attempts during the canvass to contact the elector using at least two (2) of the following methods: by mail, telephone or in person, and only after making a written memorandum of the two methods used and the dates of the two attempts. The canvass by telephone must comply with the provisions of subsections (b) through (e) of Section 9-32-7 and the provisions of Section 9-32-8.
Conn. Agencies Regs. § 9-32-9