Family Court Playbook: New York Edition · Step 5 of 13
Affirmations and Sworn Statements in New York Family Court
How CPLR 2106 affirmations work, where the statewide forms use them, and which papers CourtHelp still describes as notarized
Researched by Dan Martin, Legal Researcher · Published by Onbello Legal
Affirmation instead of affidavit
In many states a sworn written statement means an affidavit signed in front of a notary. New York's CPLR 2106 provides another route: the statement of any person, wherever made, subscribed and affirmed by that person to be true under the penalties of perjury, may be used in a New York action in place of and with the same force and effect as an affidavit.
The rule lists exceptions: a deposition, an oath of office, and an oath required to be taken before a specified person other than a notary. It also says it does not eliminate any Domestic Relations Law requirement that matrimonial agreements be acknowledged in the form of a deed. Family Court Act § 165 applies the CPLR in Family Court where the Family Court Act does not prescribe a procedure.
The wording CPLR 2106 calls for
The rule says the affirmation shall be in substantially this form:
Where you will see it
- Custody petitions. GF-17, GF-40 and GF-41 each end with a verification in which the petitioner affirms under the penalties of perjury that the statements are true to their own knowledge, except matters stated on information and belief.
- Financial disclosure. Form 4-17 is titled Financial Disclosure Affirmation and ends with an affirmation under the penalties of perjury that the statements are true. Unlike the custody petitions, it has no exception for matters stated on information and belief.
Penalties of perjury are real
Papers CourtHelp still describes as notarized
The court system's CourtHelp pages still describe some papers as signed in front of a notary:
- The Address Confidentiality Affidavit, used to ask that your contact information be kept from the other side
- The Affidavit of Service, signed by the person who delivered the papers
Ask the clerk which format your court accepts before you sign.
A written statement does not replace witnesses
At a hearing, the judge hears testimony. CourtHelp explains that witnesses come to court to answer questions, and that a witness who will not come voluntarily can be required to come by a subpoena. If someone saw something important, plan for them to testify. See the evidence guide.
Writing the facts
Whatever the format, the court reads the facts, not adjectives. Use dates, places and what you saw or heard. For example, "On March 3, Daniel Reyes did not bring the children to the 6 p.m. exchange at the school" tells the judge more than "he never follows the schedule."
Common questions
Do my New York court papers need to be notarized?
Not always. CPLR 2106 lets any person sign a statement affirmed to be true under the penalties of perjury, and use it in place of an affidavit, with exceptions. The statewide custody and support forms use this kind of affirmation. CourtHelp still describes some papers, such as the Affidavit of Service and the Address Confidentiality Affidavit, as signed in front of a notary, so ask the clerk which format your court accepts.
Sources
Statutes, court rules and forms change. Check the current version before you rely on anything on this page.
- CPLR 2106 (affirmation under penalty of perjury)
- Family Court Act § 165 (CPLR applies where FCA is silent)
- Form GF-17, Petition (Custody, Visitation), rev. 1/2026
- Form GF-40, Petition for Modification of Order of Custody or Visitation, rev. 1/2026
- Form 4-17, Financial Disclosure Affirmation, rev. 4/2025
- NY CourtHelp: Starting a Case in Family Court
- NY CourtHelp: Filing an Affidavit of Service
- NY CourtHelp: Preparing for Trial: Evidence
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