Each individual in Unites States, is required to be registered with US government by law. The way we have registration in India through Ration Card it is Social Security here. This number is very useful for the government as well as the for the individual. Government can keep track of the individual from this particular number. You will need the SS number for any official Paper work or dealings e.g. while filling Tax forms or while opening a bank account or while getting a membership in the public library. A person's entire credit history can be traced from this number.

As soon as one arrives in US he/she is required to get Social Security number immediately. It is a very simple procedure. Every town or a city has a Social Security office. You have to go there with your Passport. First thing you need to do is collect the application form for new social security number. These forms are available in various languages. Find one in English and fill it completely. It will ask you for your local postal address details besides other information. The officer will check your application form and passport. After checking everything you will be informed when you will be receiving your Social Security number, which will be by postal mail. Generally within three to four weeks time you will receive your social security number which appears printed on a small card, which you should carry/preserve safely.