請教8老師，給父母 renew 綠卡，填 I-90 的問題

請教  Part 3. Processing Information

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:

 

父母的綠卡是10年前批準的。已經不記得當年的材料寄到哪個 USCIS office 了。另外那個通知綠卡通過的 797(?)表也早就找不到了。根本沒想到這麽多年以後居然還要填這個信息。請問怎麽才能找到相關信息，填上去呢？

 

感激不盡！