A passport is a loan of authority, not a souvenir
A passport may sit in your wallet, but in many countries the booklet itself remains the property of the government that issued it. That reflects what the document does: it is an official request, made in the state’s name, asking other governments to let its bearer cross a border and receive protection as a national abroad. The holder uses that request; they do not own the authority behind it.
Why the distinction matters
Because the passport is an official document, the issuing government can control whether it remains valid. Depending on that country’s laws and the circumstances, authorities may cancel it, limit its use, or require it to be surrendered. The exact grounds and procedures differ by country, so government ownership does not mean an official can take any passport for any reason.
It also explains why a passport is treated differently from an ordinary lost possession. If yours disappears, you generally need to report it to the issuing authority rather than simply replace a personal item; the old document may be invalidated so it cannot continue circulating as a usable travel credential.
The booklet and the permission are not the same thing
Possessing a passport does not guarantee entry into another country. Border officials there decide whether to admit the traveler, while the issuing government controls the document it produced. The passport travels with you, but its legal force remains tied to the state that issued it.
