Conn. Practice Book § 24-31

(a) The judicial authority may, upon motion, and

after such notice by mail, or otherwise as it may

order, open any judgment rendered under this

procedure for lack of actual notice to a party, or,

within four months from the date thereof, for any

other cause that the judicial authority may deem

sufficient, and may stay and supersede execu -

tion; except that the judicial authority may, for the

reasons indicated above, open any judgment rendered by default at any time within four months

succeeding the date upon which an execution

was levied. The judicial authority may also order

the repayment of any sum collected under such

judgment and may render judgment and issue

execution therefor. Costs in an amount fixed by the

judicial authority and not exceeding $100 may be

awarded, in the discretion of the judicial authority,

for or against either party to a motion to open the

judgment, and judgment may be rendered and

execution may be issued therefor; and any action

by the judicial authority may be conditioned upon

the payment of such costs or the performance of

any proper condition.

(b) When a judgment has been rendered after a

contested hearing on the merits, a motion to open

shall be scheduled for hearing only upon order of

the judicial authority.