我國曾於1998年間與美國簽署雙邊協議，規定我國有戶籍國人所持中華民國護照(護照資料頁有登載身分證字號)倘過期時間在6個月內，仍可被美國政府視為專供返回臺灣的「有效」旅行文件。此外，若我國有戶籍國人護照效期不滿6個月，航空公司及美國政府亦仍可受理作為返回臺灣之旅行文件。
基於上述協議，我國人持過期6個月內且載有國民身分證字號之中華民國護照，應均可自本處服務區域(北加州、內華達州及猶他州)國際機場搭乘直航班機返臺。
另近期曾發生我國旅客符合上述護照逾期未超過6個月，但聯合航空(UA)依據內部作業準則仍拒予登機事例。本處已洽該公司說明，目前聯航已配合修改上述準則，以符合臺美協定有關雙方國人均可持逾期未超過6個月護照返國之規定。為確保返國行程順利，建議國人如有護照逾期在6個月內急需返國情況，於搭機前可先聯繫航空公司說明確認。若有需要，亦可考量先到本處辦理入國證明書，以持憑返國。
相關協議內容請參考(要點登載於前三頁):19981210-passport-validity-for-admission。
辦理入國證明書網頁資訊: https://www.taiwanembassy.org/ussfo/post/147.html
Note for Taiwanese nationals returning to Taiwan with a Republic of China (Taiwan) passport within 6 months of expiration
In 1998, Taiwan completed a bilateral agreement with the United States stipulating that a Passport issued by the Taiwan government for citizens with household registration (with an ID number on the passport information page) will grant the bearer admission to Taiwan for up to six months beyond the expiration date specified in the Passport.
In addition, if it has been less than 6 months after the specified expiration date, airlines and the US government should recognize the passport as a valid travel document for returning to Taiwan.
Based on the above agreement, Taiwanese citizens holding a Republic of China (Taiwan) passport with a national ID card number and within 6 months of expiration should be able to take a direct flight back to Taiwan from international airports in our service area (Northern California, Nevada and Utah).
Please refer to the below link for agreement content (the main points are posted on the first three pages): 19981210-passport-validity-for-admission.
