Social Security Number
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In Spanish known as Número de la Seguridad Social (NUSS) is the Social Security identification number assigned to every individual. In addition to the general identification number (NIE), a separate number is required to be registered with Social Security. Once assigned, the NUSS is permanent and never changes. It is mandatory if you wish to receive a pension, subsidy, or any benefits from Social Security. It is also necessary to apply for public health insurance. When a person starts working for the first time, the NUSS becomes the Número de Afiliación (NAF). In short, the NUSS serves as a general identification number, while the NAF is a specific identifier used for employment and Social Security purposes.
