The Assessor's Identification Number or AIN is the main indexing system used for property tax purposes. The AIN is a ten-digit number assigned to each piece of real property and is used on tax bills and correspondence to identify real property.
Considering this, what is your property ID?
A property is liable for Local Property Tax (LPT) if it was a residential property on the valuation date of 1 May 2013. You are liable to pay LPT if you are the owner of a liable property on the liability dates. Each property will have a unique property identification number (ID) for LPT purposes.
What is the property number?
If you qualify for the Illinois Property Tax Credit, you will need your Property Index Number, sometimes called "parcel number" or "permanent index number." This number is located on your county tax bill or assessment notice (for property tax paid in 2013 on your principal residence).
What is a property account number?
An assessor's parcel number, or APN, is a number assigned to parcels of real property by the tax assessor of a particular jurisdiction for purposes of identification and record-keeping. Property identification number (PIN) Property identification (PID) Property account number. Tax account number.