问题11，
Have yo ever before applied for employment authorization from USCIS?
我毕业后申请过EAD， 所以要填YES
可是我怎么知道当时是哪个 USCIS OFFICE？ 和DATE？
（EAD卡我有， 但是卡上没有这些信息）
多谢多谢！
f********e 发帖数: 760
2
看797的approval notice啊，還保存吧？至少EAD卡上可以確認servicec enter。比如
：
The first three letters indicate the USCIS service center which is
processing the petition, as follows:
- EAC - Vermont Service Center;
- WAC - California Service Center;
- LIN - Nebraska Service Center; and
- SRC - Texas Service Center.
