How do I confirm a local law. Some say Palm Beach County requires an individual (new resident) must live here for 3 months before they can buy a hand gun. Some dealers said they never heard of that.
There is nothing that I am aware of such a restriction.
You are required to have proof of FL residency (like in most any other state), with FL ID (driver's license).
I know that I, as a permanent resident (non citizen) has to provide per ATF req's need to, in addition, provide 3 months worth of proof of residency - ie utility bills, cc statement, etc. This does not apply to US citizens.
If any store states differently, it may be their own specific store policy, and not a fed, state or county law.
I ran into a situation like this at a Basspro down in Dania Beach. They refused to accept my CC statements as proof of residency and tried to tell me it was ATF requirements.
I took them on on this, proving that ATF requirements clearly indicated that CC statements are acceptable, and it eventually transpired (from Basspro Head Office) that it is a store policy. They would not sell me the firearm and they lost my business based on this policy. Another online dealer + local FFL got my business.
Their business, their policy, their loss