The letter usually hits at the worst time. You open a notice from the county, see the word delinquent, and your stomach drops. If the property is inherited, vacant, tied up in probate, or shared with family members who won't return calls, the stress gets worse fast. In South Florida, back taxes on property are not a casual late bill. They trigger a legal process that can end in a forced sale if you wait too long. That matters in Miami-Dade and Broward, where rising values often…