safe-conduct

Short definition from Wiktionary

Noun

1. 1
   A document that grants safe passage through enemy territory in times of war.
2. 2
   A convoy or guard to protect a person in a foreign country.
3. 3
   The security given by authority of a government to a stranger for his quietly coming into and passing out of the territories over which said government has jurisdiction or control.

Verb

1. 1
   To guarantee safe passage by granting such a document.