請教皮匠，文章中的H-4 stamp 是指什麽？

http://www.nrilinks.com/immigration/visatypes/h4_faq.htm

Q: My wife was here in U.S. on H-4 status. She later applied for a job and got her status changed to H-1B. Now, her employer has laid her off. How long does she retain her H-1B status and when does she revert back to her H-4 status?
A: She only retains her H-1B status while she is working for that employer, so she should immediately file an I-539 to change back to an H-4. She will not automatically revert to H-4 status. When she files her petition to change to H-4, she will be in status while it is pending. If her H-4 stamp is still valid in her passport, the easiest thing to do is to have her travel abroad. When she reenters with an H-4, she'll be in the correct status.

所有跟帖： 

• 小白兔，知名度和那位高人指點一下吧。 -nanmu- ♀ (63 bytes) () 04/08/2008 postreply 18:17:56

• That refers to Visa - 回複：請教皮匠，文章中的H-4 stamp 是指什麽？ -pjiang- ♀ (168 bytes) () 04/08/2008 postreply 19:04:04

• 從加拿大出境， 回來時要到美國大使館簽證嗎？Thanks -nanmu- ♀ (0 bytes) () 04/08/2008 postreply 19:24:55

• 還是在海關簽證? Do I need to make appointment? Thanks -nanmu- ♀ (0 bytes) () 04/09/2008 postreply 09:11:30