This is a valid concern for short sale process of a home. The first step is to always consult your attorney and let them know your current situation.
In Florida there are a few possible outcomes that can occur from a short sale, from being given a promissory note to pay the difference between your mortgage amount and sales price to being released and satisfied from your mortgage.
Keep in mind these are just a few possibilities, if you would like to have more questions answers please contact me. I can help you with this process!