Municipal corporations — Code enforcement — Due process — Notice — City’s citation and imposition of fines violated due process where hearing notices were mailed to corporate property owner’s principal address rather than to its registered agent — Because brevity of hearing and transcript makes it clear that special magistrate failed to review documents in record, and magistrate’s order does not reference findings of fact or conclusions of law, order is not supported by competent substantial evidence — Magistrate departed from essential requirements of law by failing to make findings of fact in his order or on the record