If the property is located in Florida, then you could simply use a form that is legally sufficent in Florida. Mind you, the "form" I am referring to does not mean some garbage legal document drafted by a non-lawyer on Google. You should hire local counsel to draft the document for you. Then you can have a civil notary public verify your signature through the proper, legal means. Then you could have your attorney-in-fact handle the transaction in Florida.
Answered on Aug 11th, 2016 at 7:18 PM