各位请教一个问题:
LD回国马上要返回美国,check in的时候united要求选择residency status
1 I am a US permanent resident
2 US permanent resident, but does not have document information
3 I am not a US permanent resident
additional information说如果不是US resident也没有visa,就需要ESTA(
Electronic system for travel authorization) approval。
请问用AP如果该怎么选啊?另外入关时候走那条通道呢?多谢多谢!