Upon arriving in the United States, all participants must register their housing address in SEVIS (within 10 days of arrival). After SEVIS registration is complete, participants should wait 3-4 business days before applying for a Social Security number at their local Social Security office. The Social Security Administration recommends waiting at least 10 days after arriving in the United States before applying. If you do not register in SEVIS, you will not receive a Social Security number. Your local Social Security office can be found by visiting: www.ssa.gov/locator