Post Pour Inspection of Driveway Slab

We did a post pour inspection of a driveway slab.
The slab was about 20 feet wide and about 100 feet long.
The contractor did not pull the permit or had the driveway inspected.
In order to do the post pour inspection we had to core the slab and check the thickness of the slab, gravel and bearing capacity of the subgrade.
Incurring extra cost for the client.
All this could have been avoided if the contractor had pulled a permit.