The notice shall contain all the following:

1. (a) A description of the property assessed.
2. (b) The name of the person to whom it is assessed or a statement that it is assessed to unknown owners if such is the fact.
3. (c) The amount then due on the property.
4. (d) A notice that the property assessed will be sold on the date therein stated in front of the county courthouse to pay the amount then due on the property.