Some property does not yet have an official address. Mostly vacant land. I bought a vacant lot once and it was on the corner and they gave my the choice of which street i wanted to face the house and the address I wanted. A lot of deals will say the address as 0 ABC Street for instance until someone builds a building on the property. To find the property you can use the plot plan.
The date and original are on the original document. Some counties have a lot of these on their web site as well. If not you can find at the courthouse.