2016 New York Laws
CVP - Civil Practice Law & Rules
Article 30 - (Civil Practice Law & Rules) REMEDIES AND PLEADING
R3021 - Form of affidavit of verification.

Rule  3021.  Form  of  affidavit  of  verification.  The  affidavit of
  verification must be to the effect that the  pleading  is  true  to  the
  knowledge of the deponent, except as to the matters therein stated to be
  alleged  on  information  and  belief,  and  that as to those matters he
  believes it to be true. If it is made by a person other than the  party,
  he  must  set forth in the affidavit the grounds of his belief as to all
  matters not stated upon his knowledge and the reason why it is not  made
  by the party.