取得綠卡和入籍後要更新SS Card，SSA的規定參見http://www.ssa.gov/pubs/10002.html中的以下兩段話。
不換卡會有什麽問題或不便，我也不知道，反正既然這麽規定，換了放心點。
換卡不花錢，要花時間排隊。ssa.gov網站上輸入ZIP code後就會告訴你就近的SSA辦公室，但隻列出最近的一個，不一定是人少的一個，問問同事去過哪個人少，可以省時間。（慢的要可能等一個多小時）。
What if my immigration status or citizenship changed?
=====================================================
If your immigration status changed or you became a U.S. citizen, you should tell Social Security so your records can be updated. To get your immigration status or citizenship corrected, you need to show documents that prove your new status or citizenship. Only certain documents can be accepted as proof of citizenship for new and replacement cards. These include your U.S. passport, a Certificate of Naturalization or a Certificate of Citizenship. If you are not a U.S. citizen, Social Security will ask to see your current immigration documents.
Are there different types of cards?
====================================
We issue three types of Social Security cards. All cards show your name and Social Security number.
The first type of card shows your name and Social Security number and lets you work without restriction. We issue it to:
U.S. citizens; and
People lawfully admitted to the United States on a permanent basis.
The second type of card shows your name and number and notes, “VALID FOR WORK ONLY WITH DHS AUTHORIZATION.” We issue this type of card to people lawfully admitted to the United States on a temporary basis who have DHS authorization to work.
The third type of card shows your name and number and notes, “NOT VALID FOR EMPLOYMENT.” We issue it to people from other countries:
Who are lawfully admitted to the United States without work authorization from DHS, but with a valid nonwork reason for needing a Social Security number; or
Who need a number because of a federal law requiring a Social Security number to get a benefit or service.
不換卡會有什麽問題或不便，我也不知道，反正既然這麽規定，換了放心點。
換卡不花錢，要花時間排隊。ssa.gov網站上輸入ZIP code後就會告訴你就近的SSA辦公室，但隻列出最近的一個，不一定是人少的一個，問問同事去過哪個人少，可以省時間。（慢的要可能等一個多小時）。
What if my immigration status or citizenship changed?
=====================================================
If your immigration status changed or you became a U.S. citizen, you should tell Social Security so your records can be updated. To get your immigration status or citizenship corrected, you need to show documents that prove your new status or citizenship. Only certain documents can be accepted as proof of citizenship for new and replacement cards. These include your U.S. passport, a Certificate of Naturalization or a Certificate of Citizenship. If you are not a U.S. citizen, Social Security will ask to see your current immigration documents.
Are there different types of cards?
====================================
We issue three types of Social Security cards. All cards show your name and Social Security number.
The first type of card shows your name and Social Security number and lets you work without restriction. We issue it to:
U.S. citizens; and
People lawfully admitted to the United States on a permanent basis.
The second type of card shows your name and number and notes, “VALID FOR WORK ONLY WITH DHS AUTHORIZATION.” We issue this type of card to people lawfully admitted to the United States on a temporary basis who have DHS authorization to work.
The third type of card shows your name and number and notes, “NOT VALID FOR EMPLOYMENT.” We issue it to people from other countries:
Who are lawfully admitted to the United States without work authorization from DHS, but with a valid nonwork reason for needing a Social Security number; or
Who need a number because of a federal law requiring a Social Security number to get a benefit or service.
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