Question: how to legally change your child's last name in missouri?
Answer: Step 1 – Fill-in Petition for Change of Name by Parent (or Next Friend) ...  Step 2 – Notarize Petition for Change of Name. ...  Step 3 – Obtain Notarized Consent (If Applicable) ...  Step 4 – Gather Documents. ...  Step 5 – File Petition with Circuit Court. ...  Step 6 – Pay Filing Fee. ...  Step 7 – Attend Possible Hearing.