Question: how to change a child's last name in the state of florida?
Answer: Get Fingerprinted. Each person seeking the child's name change is called a "petitioner." A petitioner in a child's case could be one or both parent(s) or legal guardian(s). ... 
Complete and Submit the Paperwork. ... 
Obtain Consent and Request a Hearing. ... 
Attend the Hearing. ... 
Get Certified Copies of the Court Order.