In the U.S. your success will largely depend on the district's/school's policy. Some will be happy to change it with proof, while others won't change your name at all. No one as far as I know has tested it in court, but some argue that FERPA might require public schools to allow you to update your name (if you graduated from a private school you're basically on your own). Here's another tip I learned from someone whose child's last name was changed: Some schools require the name on your records be exactly the same as on your birth certificate, so if you've amended your birth certificate to reflect your new name you might try presenting that and not just the court order. (The school in question here wouldn't change the student's last name with just the court papers, and had to get a BC amendment.)