He posts on his Instagram to verify authenticity: https://www.instagram.com/p/DXwf7pis6KT
replyIf you want to know authenticity, you submit to https://pestcontroloffice.com/auth1.asp -- they verify / deny, and that is the final word.
replyIs that site for real? It almost seems like some kind of Monty Pythonesque humour site.
replyYes it's real: https://banksy.co.uk/in.html (licensing)
replyHis agent would tell the media that your vandalism is not genuine
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