Form 12.900(h) at a glance
What it is: Florida Family Law Rules of Procedure Form 12.900(h), Notice of Related Cases, is used to provide the required notice to the court.
Where and when to file: This form should be typed or printed in black ink. It must be filed with the clerk of the circuit court with the initial pleading in the family law case.
Florida Rule of General Practice and Judicial Administration 2.545(d) requires the petitioner in a family law case to file with the court a notice of related cases, if any. Your circuit may also require this form to be filed even if there are no related cases.
A filled-in Form 12.900(h) example: a petitioner lists one related custody case

How to fill out Form 12.900(h), box by box
Judicial Circuit, County, Case No. and Division
Title of last Court Order/Judgment and Relationship of cases

Enter the Title of last Court Order/Judgment (if any) and the Date of Court Order/Judgment (if any).
For Relationship of cases, check all that apply: pending case involves same parties, children, or issues; may affect court's jurisdiction; order in related case may conflict with an order in this case; order in this case may conflict with previous order in related case.
Write the Statement as to the relationship of the cases.
Coordination of litigation

2. Check one only: I do not request coordination of litigation in any of the cases listed, or I do request coordination of the following cases.
Check all that apply: Assignment to one judge, or Coordination of existing cases will conserve judicial resources and promote an efficient determination of these case because:
Dated and Petitioner's Signature
CERTIFICATE OF SERVICE

Under CERTIFICATE OF SERVICE, I CERTIFY that I delivered a copy of this Notice of Related Cases to the County Sheriff's Department or a certified process server for service on the Respondent, and [check all used] e-mailed, mailed, hand delivered, a copy to {name}, who is the [check all that apply] judge assigned to new case, chief judge or family law administrative judge, {name} a party to the related case, {name} a party to the related case on {date}.
Enter the Signature of Petitioner/Attorney for Petitioner, Printed Name, Address, City, State, Zip, Telephone Number, E-mail Address(es) and Florida Bar Number.
IF A NONLAWYER HELPED YOU FILL OUT THIS FORM
More rules for Form 12.900(h)
A copy of the form must be served on the presiding judge, either the chief judge or the family law administrative judge, and all parties in the related cases. You should also keep a copy for your records. Service must be in accordance with Florida Rule of General Practice and Judicial Administration 2.516.
Before proceeding, you should read “General Information for Self-Represented Litigants” found at the beginning of these forms. The words that are in ”bold and underline” in these instructions are defined there. For further information, see Florida Rule of General Practice and Judicial Administration 2.545(d).
A person who is NOT an attorney is called a nonlawyer. If a nonlawyer helps you fill out these forms, that person must give you a copy of a Disclosure from Nonlawyer, Florida Family Law Rules of Procedure Form 12.900(a), before he or she helps you. A nonlawyer helping you fill out these forms must also put his or her name, address, and telephone number on the bottom of the last page of every form he or she helps you complete.
Sources
[1] Form 12.900(h) (02/24), Notice of Related Cases, Florida Family Law Rules of Procedure (the Official source link on this page).






