Conn. Practice Book § 25a-8

(a) On a petition for support or the establishment of parentage when the adverse party resides

out of or is absent from the state or the where -

abouts of the adverse party are unknown to the

plaintiff or the applicant, any judicial authority or

clerk of the court may make such order of notice

as he or she deems reasonable. If such notice is

by publication, it shall not include the automatic orders set forth in Section 25a-7, but shall,

instead, include a statement that automatic orders

have issued in the case pursuant to Section 25a-

7 and that such orders are set forth in the application or petition on file with the court. Such notice

having been given and proved, the judicial authority may hear the application or petition if it finds

that the adverse party has actually received notice

that the application or petition is pending. If actual

notice is not proved, the judicial authority in its

discretion may hear the case or continue it for

compliance with such further order of notice as it

may direct.

(b) With regard to any motion for modification

or for contempt or any other motion requiring an

order of notice, where the adverse party resides

out of or is absent from the state, any judicial

authority or clerk of the court may make such

order of notice as he or she deems reasonable.

Such notice having been given and proved, the

court may hear the motion if it finds that the

adverse party has actually received notice that

the motion is pending.