Visit the Missouri Circuit Court of the county you live in. Ask the court clerk for the Petition for Name Change.
Complete the name change petition. You must enter your current name, the name you want and the exact reason you're changing it. Missouri law allows a judge to deny a name change if the change is for detrimental purposes, so clearly state your reason. You also need your birth date and place of birth, your parent's names -- including your mother's maiden name -- and your spouse and children's names if you're married or have children. File the petition. Fees for filing vary by county. The court will give you a hearing date either right after filing or by mail, depending on the county.
Attend the hearing. Judges ask questions about your reason for the name change in Missouri, so be prepared to explain why you're requesting a new name.
Contact a newspaper that is circulated in your county as soon as the order is granted. Tell the newspaper you want to run a legal notice of a name change. The newspaper will need your old name, new name, the name of the court that granted the order and order date. Schedule the notice to run at least three times within the next 20 days. The newspaper will notify the court once the ad has been run, and you will receive your final name change order in the mail.