Can restaurants operate on an honor system when it comes to proof of vaccine? Attorney Corey Hogan tells 7 Eyewitness News reporter Olivia Proia restaurants can request proof of vaccine or simply put a sign up saying it's an honor system. Restaurants can also ask if individuals are vaccinated without requiring proof. and last updated 2021-05-19 17:42:53-04 CHEEKTOWAGA, N.Y. (WKBW) â New York restaurants are facing a new set of guidelines, where the state said vaccinated individuals, with proof of vaccine, can dine at full capacity with no masks. Unvaccinated individuals must sit in a socially distanced section with masks.