When you apply, make sure you request a temporary certificate (form SSA-5030) from the Social Security Officer. This temporary certificate has no number, but it is proof that you have applied for the card. You may call the Social Security Administration’s toll free number 1-800-772-1213 approximately ten business days after applying for your card in order to find out the status of your application.
You must report your Social Security number to your employer immediately after receiving it. If you leave a place of employment after receiving wages, but before receiving your number, you are still required to report the number to your former employer.