Conn. Gen. Stat. § 7-51a

(b) For marriage and civil union licenses, the Social Security numbers of the parties to the marriage or civil union shall be recorded in the “administrative purposes” section of the marriage or civil union license and the application for such license. All persons specified on the license, including the parties to the marriage or civil union, officiator and local registrar shall have access to the Social Security numbers specified on the marriage or civil union license and the application for such license for the purpose of processing the license. Only the parties to a marriage or civil union, or entities authorized by state or federal law, may receive a certified copy of a marriage or civil union license with the Social Security numbers included on the license. Any other individual, researcher or state or federal agency requesting a certified or uncertified copy of any marriage or civil union license in accordance with the provisions of this section shall be provided such copy with such Social Security numbers removed or redacted, or with the “administrative purposes” section omitted.

(c) For deaths occurring on or after July 1, 1997, the Social Security number of the deceased person shall be recorded in the “administrative purposes” section of the death certificate. Such administrative purposes section, and the Social Security number contained therein, shall be restricted and disclosed only to the following eligible parties: (1) All parties specified on the death certificate, including the informant, licensed funeral director, licensed embalmer, conservator, surviving spouse, physician or advanced practice registered nurse and town clerk, for the purpose of processing the certificate, (2) the surviving spouse, (3) the next of kin, or (4) any state and federal agencies authorized by federal law. The department shall provide any other individual, researcher or state or federal agency requesting a certified or uncertified death certificate, or the information contained within such certificate, for a death occurring on or after July 1, 1997, such certificate or information. The decedent's Social Security number shall be removed or redacted from such certificate or information or the administrative purposes section shall be omitted from such certificate.

(d) The registrar of vital statistics of any town or city in this state that has access to an electronic vital records system, as authorized by the department, may use such system to issue certified copies of birth, death, fetal death or marriage certificates that are electronically filed in such system.