Conn. Gen. Stat. § 49-92d

The town clerk of the town in which the purchaser's lien is filed shall, upon request of any person having an interest in the real estate covered by that lien, discharge such lien and, if applicable, the lis pendens or notice of foreclosure, by recording in the land records a discharge of lien and, if applicable, a discharge of lis pendens or notice of foreclosure, provided the purchaser's lien has expired by a provision of the statute of limitations, and (1) no lis pendens or notice of foreclosure of the lien has been filed with that town clerk, or (2) if a lis pendens or notice of foreclosure has been so filed or recorded and a certificate, issued by the clerk of the court to which the notice referred after the return day of the foreclosure action, indicating that no such foreclosure action remains pending and that no judgment has been entered in the action in that court, has been filed for record with the town clerk.