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

來源: yumen11 於 2006-06-01 10:52:11 [] [舊帖] [給我悄悄話] 閱讀數 : (191 bytes)

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

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