En español | Possibly, depending on which country you worked in. The United States has agreements with more than 20 countries to address the special requirements of people like you. The agreements help you qualify by letting you pool your credits from both countries. The agreements may also eliminate the need for workers to pay payroll taxes to both countries on the same wages — they pay to just one system. When you're ready to apply, call Social Security at 1-800-772-1213 and ask what precise documentation you'll need. It will include such things as your U.S. and other country's Social Security numbers and proof of age.