Sadly the situation in Florida is not good.
It is impossible to get faulty registrations corrected. My business receives election material mailed to our business premises for people we do not know and definitely do not live here.
Every time we call the local officials who say mark it return to sender the it will be taken care of. It never is.
This year the official told me they have been registered at this business address for 10 years. Our business has occupied the premises for 7 and been reporting these invalid registrations.
Nothing is ever done.