PART XII ENFORCEMENT — Proof of service

Where a written notice, direction, order, determination or other document is required or permitted by this Act to be served or sent to a person, production of an affidavit of personal service or a receipt from the postal authority that the notice, direction, order, determination or document was left at a post office for delivery by registered mail is, in the absence of evidence to the contrary, proof that the notice, direction, order, determination or document was served on or delivered to the person to whom it was addressed.