Notary services are available during regular operating hours, with the exception of 30 minutes prior to closing. Appointments are recommended, but walk-ins are welcome subject to the availability of a licensed notary. To make appointment, please call:


Library Phone Number: (631) 360-2480

Commack Building: ext. 397
Nesconset Building: ext. 212
Kings Park Building: ext. 497
Smithtown Building: ext. 194

Please keep in mind:

  • Every notarized signature must have the signer present and present a valid, non-expired, driver's license or other government issued photo ID.
  • Government-issued photo identification must be provided at the time of service.
  • If a document requires an additional witness(es) to a signature, the Library will not provide additional witnesses nor may witnesses be solicited from other library patrons or staff.
  • Some documents cannot be notarized.
  • You must bring the complete document.

Click here for the Library's Notary Service Policy.