Fla. Stat. § 68.093

(2) As used in section, the term: (a) “Action” means an action: 1. Governed by the Florida Family Law Rules of Procedure, the Florida Rules of Civil Procedure, rule 5.025 of the Florida Probate Rules, or the Florida Small Claims Rules; or 2. In another state court or federal court governed by rules of procedure that are comparable to the rules of procedure specified in subparagraph 1. (b) “Security” means an undertaking by a vexatious litigant to ensure payment to a party in an amount reasonably sufficient to cover the party’s anticipated, reasonable expenses of litigation, including attorney fees and taxable costs. (c) “Vexatious litigant” means a person, as defined in s. 1.01(3), proceeding pro se, who: 1. In the immediately preceding 7-year period, has commenced, prosecuted, or maintained, pro se, five or more actions in any court that have been finally and adversely determined against such person, except that an action may not be included for purposes of this subparagraph if the court finds that the action was commenced, prosecuted, or maintained in good faith; 2. After an action has been finally and adversely determined against the person, repeatedly relitigates or attempts to relitigate either the validity of the determination against the same party as to whom the action was finally determined or the cause of action, claim, controversy, or any of the issues of fact or law determined by the final and adverse determination against the same party as to whom the action was finally determined; 3. Repeatedly files pleadings, requests for relief, or other documents that have been the subject of previous rulings by the court in the same action; 4. Repeatedly files unmeritorious pleadings, requests for relief, or other documents; conducts unnecessary discovery; or engages in other tactics that are frivolous or solely intended to cause unnecessary delay in any action; or 5. Has been previously found to be a vexatious litigant pursuant to this section or by another state court or a federal court.An action is not deemed to be “finally and adversely determined” if an appeal in that action is pending.

(3)(a) In any action pending in any court of this state, any party may move the court, upon notice and hearing, for an order requiring an opposing party to furnish security. The motion shall be based on the grounds, and supported by a showing, that the opposing party subject to the motion is a vexatious litigant and is not reasonably likely to prevail on the merits of the action against the moving party.

(b) At the hearing for an order to post security, the court shall consider any evidence, written or oral, by witness or affidavit, which may be relevant to the consideration of the motion. No determination made by the court in such a hearing shall be admissible on the merits of the action or deemed to be a determination of any issue in the action. If, after hearing the evidence, the court determines that the opposing party subject to the motion is a vexatious litigant and is not reasonably likely to prevail on the merits of the action against the moving party, the court shall order the vexatious litigant to furnish security to the moving party in an amount and within such time as the court deems appropriate.

(c) If the vexatious litigant fails to post security required by an order of the court under this section and the vexatious litigant is:

(d) If the motion for an order to post security is filed before the trial in an action, the action shall be automatically stayed and the moving party need not plead or otherwise respond to the vexatious litigant’s complaint, pleading, request for relief, or other document until 10 days after the motion for an order to post security is denied. If the motion for an order to post security is granted, the moving party shall respond or plead no later than 10 days after the required security has been furnished.

(4) In addition to any other relief provided in this section, the court in any judicial circuit may, on its own motion or on the motion of any party, enter a prefiling order prohibiting a vexatious litigant from commencing, pro se, any new action in the courts of that circuit without first obtaining leave of the court. Disobedience of such an order may be punished as contempt of court. Leave of court shall be granted by the court only upon a showing that the proposed action is meritorious and is not being filed for the purpose of delay or harassment. The court may condition the filing of the proposed action upon the furnishing of security as provided in this section.

(5) The clerk of the court may not file any new action by a pro se vexatious litigant against whom a prefiling order has been entered unless the vexatious litigant has obtained an order from the court allowing such filing. If the clerk of the court mistakenly allows a pro se vexatious litigant to file any new action in contravention of a prefiling order, any party to that action may file with the clerk and serve on the vexatious litigant and all other parties a notice stating that the vexatious litigant is subject to a prefiling order. The filing of such a notice shall automatically stay the litigation against all parties to the action. The court shall automatically dismiss the action with prejudice within 10 days after the filing of such notice unless the vexatious litigant files a motion for leave to file the new action. If the court issues an order granting leave, the pleadings or other responses to the complaint need not be filed until 10 days after the date of service by the vexatious litigant of a copy of the order granting leave.

(6) The clerk of a court must provide copies of all prefiling orders to the Clerk of the Florida Supreme Court, who must maintain a registry of all vexatious litigants.

(8) The relief provided under this section shall be cumulative to any other relief or remedy available under the laws of this state or the rules of court, including, but not limited to, the relief provided under s. 57.105.