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1. Location where you applied for an immigrant visa or adjustment of status:

2. Location where your immigrant visa was issued or USCIS office where you were granted adjustment of status:

父母的绿卡是10年前批准的。已经不记得当年的材料寄到哪个 USCIS office 了。另外那个通知绿卡通过的 797(?)表也早就找不到了。根本没想到这么多年以后居然还要填这个信息。请问怎么才能找到相关信息，填上去呢code

-Find the USCIS Service Center code from the bottom of your green card (front or back side), i.e., it consists of numbers, USCIS service center code such as WAC, SRC, mark such as <<< . Then, find the USCIS Service Center which handled your case using the code from the following information:

• California Service Center: Formerly known as Western Adjudication Center, this center's code is WAC or CSC
• Nebraska Service Center: Formerly known as Lincoln Service Center, this center's code is LIN or NSC
• Texas Service Center: Formerly known as Southern Regional Center, this center's code is SRC or TSC
• Vermont Service Center: Formerly known as Eastern Adjudication Center, this center's code is EAC or VSC
• Potomac Service Center: This center's code is YSC