The California Courts Self-Help Center has instructions and forms to start the process to change your name or obtain a court order recognizing change of gender. If a judge agrees, they will give you a court order that states your new legal name.To change your name, or both your name and gender on your birth certificate, you must go through the following steps: 1. Obtain a court order. Changing your name through marriage is a big milestone – and a sometimes confusing one. Here's some information to make it easier. After I get the court order, what do I submit to amend my birth certificate? • You will need to complete an Amendment of Birth. Gov, click "Self Help," then "More. When completing the form, print clearly in BLACK or BLUE INK with NO WHITEOUT.