Question: how to get proof of a social security number?
Answer: Or you can call our toll-free number, 1-800-772-1213 (TTY 1-800-325-0778), and ask for helpful publications, such as: • How To Create An Online Account (Publication No. 05-10540); • Your Social Security Number And Card (Publication No. 05-10002); and • What You Can Do Online (Publication No. 05-10121).