Must I-94 be returned when leaving US ??

来源: 于 2008-07-21 14:41:12 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

I have a I-94 with "Multiple entries" on it. I got it when I entered US from Canada with Canadian passport. Now I have a trip to Europe. Do I need to return the I-94 to the Airline when leaving. Can I keep the "multiple
entries" I-94 for reentering US from Europe.
Thank you very much in advance. Need your urgent advice