In plain English
Each passport or identity document has its own official number. It is printed on the document and serves to distinguish that specific document from others.
In context
Here, it means the official number from the passport or other identity document that the field asks you to enter.
- Situation
- Changing trips, requesting refunds, reading disruption options, and handling travel documents
- What it communicates
- labels the field for the identifying number on the travel document.
Meaning limits
The term refers only to the document's identifying number, not to every number that may appear on the document.
Examples
“The clerk copied the document number from her passport, not the date at the bottom of the page.”
“Applicants must enter the full document number exactly as printed on the identity card.”