Do you have another passport or travel document?

您有另外一份护照或旅行证件吗？

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Present valid overseas travel document before payment.

付款前请出示有效海外或内地旅游证件。

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Please present valid passport or travel document upon redemption.

换领时须出示有效旅游证件。

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Two airlines, Qatar Airways and Air Arabia, will have limited access to the Stolen and Lost Travel Document database.

BBC: How safe is your passport?

Passengers vetted via background checks would have a biometric identifier, such as their fingerprint or iris pattern, in their passport or other travel document.

BBC: New measures in airport security

To qualify for the program, countries must meet strict security criteria, such as information-sharing agreements, travel document standards and law enforcement cooperation.

FORBES: Destination: USA