Curfew pass

A curfew pass or a movement and curfew pass is a document which authorizes public officials or civilians to travel within – or to and from – an area under an imposed curfew.

Trivia

The A 38 pass from the animated film Asterix Conquers Rome, a satire on bureaucracy, is now used to describe it.
In March 2020, there was a partial curfew in France due to the COVID-19 pandemic, and it was compulsory to carry a self-completed Attestation de déplacement dérogatoire form with you in public, stating a valid reason for leaving the house. This certificate was also referred to as a "pass" in the German-speaking media.