Bonjour Je donne 20 point Pour la personne qui m'aidera à répondre à cette question PS en anglais nous parlons de banksy ​

Bonjour,


Answer : If you do not have permission - YES it's illegal. If you have permission - NO it's not illegal.
This is the way that it works in most places around the world.

The reason that this is a confusing question is because the word 'Graffiti' has ambiguous meanings.