謝謝您的信息，就是說卡比approved notice 更有用。
-Correct. The physical green card is accepted by everywhere (i.e., between USCIS, you and public) and the I-485 approval notice is only accepted by USCIS unit (i.e., between you and USCIS only). For example, your employer will not accept your I-485 Approval Notice,, but accept your green card only for the employment.
我是否可以在其他州的SSA 辦公室 去Update 我的SSN？
-Yes. But the new SSN card will be sent to the address where you update the card.
比如我有2個州的住址（來回跑），申請485時，所有文件留的是NJ 地址，Approved notice和卡都寄到了NJ地址，
但我是否可以在FL Update 我的SSN？如果可以在FL 更新SSN，是否需要提供額外文件？
-The green card is enough.
