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What is a Social Security Number and How to Apply When Settling

March 11, 2026 3 min read By My Second World
What is a Social Security Number and How to Apply When Settling
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A Social Security Number is one of the first documents new immigrants need in order to work and live in the United States. Understanding its role and how to apply for it helps you settle in faster. This article explains what a Social Security Number is and how to apply for it when settling in the US.

Social Security Number là gì

A Social Security Number (SSN) is an identification number issued by the Social Security Administration, used for employment, tax, and many other services in the United States. Each person has their own number, tied to their employment and tax records.

People working legally need a Social Security Number so their employer can report their income and make the required contributions. This is a foundational document for life in the United States.

Cách xin Social Security Number

Permanent residents can apply at a Social Security office after arriving in the United States, or in some cases register to receive one during the immigration process. You need documents proving your permanent resident status and identity.

After submitting your application, the card is usually mailed to you. So, keeping your address updated accurately is important to make sure you receive the card at the right place. This is something you should do within the first few weeks.

Security and Proper Use

A Social Security Number is sensitive information and must be kept secure to prevent identity theft. Do not share this number casually — only provide it when truly necessary and to a trustworthy party.

You should refer to guidance on Social Security numbers for non-citizens and information on how to apply for a number on the Social Security Administration’s website to do it correctly.

Summary

A Social Security Number is an identification number needed for employment, tax, and many services in the United States. Permanent residents apply at a Social Security office with documents proving their status. You should apply early, keep your address updated to receive the card, and keep this number secure.

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References

  1. U.S. Social Security Administration — Social Security Numbers for Noncitizens: https://www.ssa.gov/pubs/EN-05-10096.pdf
  2. U.S. Social Security Administration — Apply for a Number: https://www.ssa.gov/number-card

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