我妈下周二回国，突然发现绿卡找不到了。翻旧帖好像说是可以去uscis在护照上盖个章？
那么要先申请I-90还是先去盖章？
-Yes. Bring the I-90 filing receipt notice for the green card stamp (you may file I-90 online and get the receipt immediately by printing it out).
另外她回国要三个多月，如果申请I-90了她人在国内时候打指纹的通知来了怎么办？
-You can reschedule the fingerprinting for her after you receive the appointment notice.
帮她申请延期？还是先去盖章，等回来以后再申请I-90补办？
另外去uscis是需要预约infopass吗？刚查了一下local office接下来两周都没有available appointment，可以直接去吗？
万分感谢！！
