That's fine just board up his doors and tell him that he is unable to do any business until the fine is paid and then the offending material will be removed from the building by city provided workers and you take until his check clears the bank in order to finish and allow him back into the building you barricade off every single entrance and prevent entry to the building until you're done just say it's for safety sake we had to take this much time to make sure we did it correctly unlike what you did.......