Which passport do I use at security, check-in, and border control?
Dual citizens often get confused about which passport to present at each stage of international travel, such as airline check-in versus border security. Using the wrong document at immigration or security can lead to extra questioning, longer lines, or issues confirming entry rights upon return.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
Found another way around this?
Share your steps and trade-offs so fellow engineers don't have to reinvent the wheel. No account required.
- 1Using the US passport when entering the US and the Irish/EU passport when entering Ireland, and using the destination passport at check-in.Did this help you?
- 2travel with whichever passport is the easiestDid this help you?
In their words
Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.
“Do I need to bring the expired Syrian passport at all? Has anyone in a similar situation been asked for it by CBP?”source ↗
“he’s wondering when we return to Ireland can he go through passport security with his Irish passport so he doesn’t have to queue up in the non EU line or does he have to use the same American passport?”source ↗
Where this came up
People with this problem also raised
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- 8Can you travel in Schengen with an expired passport and a residence permit?
- 6Can I leave the airport on a long layover without a visa?
- 11Travel entry requirements flying from Mexico to USA on foreign passport