Question: how to apply for your ex husband's social security?
Answer: Form SSA-2 | Information You Need to Apply for Spouse's or Divorced Spouse's Benefits. You can apply: Online, if you are within 3 months of age 62 or older, or. By calling our national toll-free service at 1-800-772-1213 (TTY 1-800-325-0778) or visiting your local Social Security office.