New York Codes, Rules and Regulations
Title 22 - JUDICIARY
Subtitle A - JUDICIAL ADMINISTRATION
Chapter II - UNIFORM RULES FOR THE NEW YORK STATE TRIAL COURTS
Part 207 - Uniform Rules For The Surrogate's Court
Section 207.9 - Appearances

(a) A person not named in a citation, but who claims to be interested in the proceeding and wishes to intervene therein, shall file a notice of appearance and a petition or affidavit alleging interest.

(b) Unless otherwise directed by the Surrogate, attorneys appearing on behalf of nondomiciliaries or parties not personally served within the State must furnish acknowledged evidence of authority pursuant to SCPA 401.

(c) When directed by the Surrogate, in addition to filing an appearance as required by SCPA 404, a guardian ad litem shall serve a notice of appearance upon all parties.