Section 1.10
Unless otherwise provided in this Code, notice regarding sidewalk repairs, sewer or water connections, dangerous structures, abating nuisances or any other act, the expense of which is performed by the village and may be assessed against the premises under this Code, shall be served by: Delivering the notice to the owner personally or leaving the notice at his residence, his office or place of business with some person of suitable age and discretion; Mailing the notice by certified or registered mail to the owner at his last known address; or If the owner is unknown, posting the notice in some conspicuous place on the premises at least five days before the act or action for which the notice is given. No person shall interfere with, obstruct, mutilate, conceal or tear down any official notice or placard posted by any village officer, unless permission is given by the officer to remove the notice.