如果您持有綠卡,又離美多年,
讀了上一篇FAQ,信心大增,有恃無恐
想機票買了就可以入境.
請注意,美國移民局並不是無條件的會幫你更新證件.
謝謝有心人士(Let me know if you want the credit :D)在USCIS(美國移民局)網站上收尋到以下的資料:

保持您的永久居留權:
基本上當你有以下行為時,美國政府有權力將你驅逐出境,而你也可能因此喪失永久居留權的身份.也可能會因此被帶到移民法庭來決定你是否仍是美國永久居民.

1. 在有永久居留他國的意願,搬離美國.
2. 滯留境外超過一年,沒有辦理再入境免許(reentry permit)或是回國居民簽證(returning residence Visa)
3. 在發給再入境免許後但沒申請回國居民簽證且滯留境外超過兩年
4. 滯留境外(不管時間長短),沒有報稅
5. 在報稅表上,申明"非移民"身份

原文如下:

Maintaining Permanent Residence
Maintaining Permanent Residence You may lose your permanent residence status if you commit an act that makes you removable from the United States under the law in section 237 of the Immigration and Nationality Act. If you commit such an act, you may be brought before the immigration courts to determine your right to remain a Permanent Resident.

You may be found to have abandoned your permanent resident status if you:


Move to another country intending to live there permanently.
Remain outside of the US for more than one year without obtaining a reentry permit or returning resident visa. However in determining whether your status has been abandoned any length of absence from the US may be considered, even if it is less than one year.
Remain outside of the US for more than two years after issuance of a reentry permit without obtaining a returning resident visa. However in determining whether your status has been abandoned any length of absence from the US may be considered, even if it is less than one year.
Fail to file income tax returns while living outside of the US for any period.
Declare yourself a “nonimmigrant” on your tax returns.

乍看之下,好像只要你犯了任何一項規定,你的資格就等著被沒收了.
可是別忘記,只要你沒簽字放棄身份,你還是保有在移民法庭翻身的機會.
在美國,只要你有錢請個好律師,所有文中的maybe都可以翻盤.
看看OJ的案例就知道,連謀殺罪都可以翻了,小小的移民案件怕什麼:D
所以說當你逾期離境多時,想再返美時,請記得通知你的移民律師,來保障你的權益,不要輕言放棄哦!!