Florida Statutes Title XXXVIII. Banks and Banking § 655.79. Deposits and accounts in two or more names;  presumption as to vesting on death

(1) Unless otherwise expressly provided in a contract, agreement, or signature card executed in connection with the opening or maintenance of an account, including a certificate of deposit, a deposit account in the names of two or more persons shall be presumed to have been intended by such persons to provide that, upon the death of any one of them, all rights, title, interest, and claim in, to, and in respect of such deposit account, less all proper setoffs and charges in favor of the institution, vest in the surviving person or persons.  Any deposit or account made in the name of two persons who are husband and wife shall be considered a tenancy by the entirety unless otherwise specified in writing.

(2) The presumption created in this section may be overcome only by proof of fraud or undue influence or clear and convincing proof of a contrary intent.  In the absence of such proof, all rights, title, interest, and claims in, to, and in respect of such deposits and account and the additions thereto, and the obligation of the institution created thereby, less all proper setoffs and charges in favor of the institution against any one or more of such persons, upon the death of any such person, vest in the surviving person or persons, notwithstanding the absence of proof of any donative intent or delivery, possession, dominion, control, or acceptance on the part of any person and notwithstanding that the provisions hereof may constitute or cause a vesting or disposition of property or rights or interests therein, testamentary in nature, which, except for the provisions of this section, would or might otherwise be void or voidable.

(3) This section does not abridge, impair, or affect the validity, effectiveness, or operation of any of the provisions of ss. 655.78 and 674.405 or the rights of institutions to make payments as therein provided.