回複：８老師，照您說的，在B2 Visa沒有過期的情況下，反正舊的I-94卡在離美時就要交給

美國移民官的，那就沒有必要等到舊卡快要到期前去，而是可以在I-94卡還沒過期前的任何時候去，甚至早上離美，下午回美都沒問題了，是嗎？也沒有所為30天的問題了？

-Yes, but it is possible the CBP officer will not take away your old I-94 if you go to Mexico too early before the I-94 expires. Then, if you return to US before the I-94 expires, they will not issue a new I-94 to you. Of course, if the old I-94 expires before you return to US, you will get a new I-94 even if you do not submit the old I-94 to the CBP officer when you leave (not negative effect in this case also).

所有跟帖： 

• ８老師，您實在是太棒了！最後一問， -jordy3388- ♂ (174 bytes) () 02/08/2013 postreply 20:49:53

• 回複：８老師，您實在是太棒了！最後一問， -863211- ♂ (443 bytes) () 02/09/2013 postreply 19:49:14