To replace your Social Security card, you can request a free replacement card online or in-person. In most cases, you may not need to replace your card if you know your Social Security number. However, if you do need a replacement, you will need to provide certain documents to prove your identity, citizenship, and legal name change (if applicable) . You can find a list of acceptable documents on the Social Security Administrations website. To apply for a replacement card, you can complete an Application for a Social Security Card online or in-person at your local Social Security office. If you cannot complete the application online, you will need to provide the required documents in person. There is no charge for a Social Security card.