please help,do i need to send back my I-94 to uscis?

来源: 于 2006-06-01 10:52:11 [旧帖] [给我悄悄话] 本文已被阅读：次

I plan to live in canada for more than 30 days and come back, just wonder if i have to send my i-94 to uscis and how to send. please share your experience. i am a PR in canada.

Thanks