What are the necessary living documents for immigrating to the United States?

When you go to America, the first thing to do is to apply for a social security number. If you want to work in the United States, you must have all kinds of certificates, including your academic certificate and other professional certificates. If you start a business in the United States, you must issue a lot of business certificates. After these certificates are opened, your company or enterprise will. The driver's license must be carried with you. In addition, you need to bring a marriage certificate, some birth certificates and immunization record cards. These are all carried with you, and they are all necessary to prove their identity.