A person can't just walk into social security office demanding a new number, especially since 9/11. If you are having a domestic violence problem go to your local domestic violence office and they will put you up in a shelter/ relocation program. Sometimes but not always they can help you go to court against your abuser, and apply to get your social security number changed officially. even though your number gets changed they will still be able to locate you through your birth certificate, name and so on.. especially now that everything is computerized. On line a person , anyone can hire a background search which will result in new name, social security numbers and so on being found out for as little as $35.00 and going as high as $200.00. Your best bet is to go to court, get a restraining order and the FIRST time the abusers violate that order have them arrested (and don't retract or bail them out for they will know you will not enforce it again) most times one arrest for violating the order works because each arrest they stay in jail longer and the bail is raised.