Although the notarization of a signature raises a presumption that the signature is genuine ( see, CPLR 4538), the presumption is rebuttable ( Dart Assocs. v. Rosal Meat Mkt., 39 A.D.2d 564). Defendant-respondent Follini has submitted an affidavit in which he avers that the signatures on the indemnity agreements purporting to be his and relied upon by plaintiff are forgeries. This claim, as attested to in Follini's detailed affidavit, is sufficient to raise an issue of fact as to the authenticity of the subject signatures and, accordingly, warranted the motion court's denial of plaintiff's motion for summary judgment against Follini based on the indemnification agreement apparently bearing his signature ( see, Royal Inn v. M.A.F. Realty Corp., 105 A.D.2d 835; Langford v. Cameron, 73 A.D.2d 1001). The denial of summary judgment against Follini was additionally supported by discrepancies on the face of the notary's acknowledgment lending further substance to defendant's claim that the notary's purported acknowledgment of his signature was not properly made.

The unsworn opinion of plaintiff's handwriting expert was insufficient to support plaintiff's motion because it failed to comport with the provisions of CPLR 3212 (b).

Concur — Nardelli, J. P., Williams, Tom, Lerner and Friedman, JJ.