@Suellen-and-Lou0 Unfortunately, offering guests a tick box attesting that they are vaccinated, and assuming guests will be honest, seems a bit naive.
Anti-vaxers are notorious for lying about their status if it enables them to go where they want to, have falsified vaccination papers, and tried to force their way into establishments that inform them they aren't allowed in.
It makes much more sense to state a requirement for being vaccinated in your listing info, communicate about it when guests first book or request to book, and letting them know you will require proof on arrival.
I wouldn't trust the honor system on this.