The Treasurer-Tax Collector annually offers for sale, real property located in the County of Orange. An Offer to Purchase Real Estate sets out the terms of a proposed real estate deal.Create yours now with our free form. The Treasurer and Tax Collector mails the Annual Secured Property Tax Bills each year in October to every owner listed on the Secured Tax Roll. A person who is over age 55 to sell his or her principal place of residence and transfer its base year value to a replacement dwelling of equal or lesser value. Maintaining accurate, legible and complete tax maps identifying the parcels of land in the City. The continual Review of Property Cards to ensure accuracy. File Form 1099S, Proceeds From Real Estate Transactions, to report the sale or exchange of real estate. If you believe you have overpaid your property taxes (for real property and tangible personal property), you may be eligible for a refund. If emailing the form, please do not include your SSN for privacy reasons.