Eviction Notices: Does the Landlord Have to Give a Certified Copy of a 30 Day Notice in New York

My question involves landlord-tenant law in the State of: New York

Hello my question is we got a 30 day notice to move as we are month to month tenants I get that we can get a 30 day notice at any time.Does the notice have to be certified and signed for? Our landlord just put it under our door is this a legal document? He wishes for his daughter to have our apartment which I get it's his choice but doesn't it have to be certified mail to be legal?

Thank You

Eviction Notices: Does the Landlord Have to Give a Certified Copy of a 30 Day Notice in New York