Different states have different marking requirements and fines for parking in the handicapped parking area without a placard.
I did not list the amount in the FAQs thread, but in the area about parking, it does mention that parking without a permit can lead to ticketing and a fine. I just didn't put how much so I didn't have to worry about it getting updated.
One of the Federal requirements each state must meet for handicapped parking permits is that the permit must be able to be traced back to the person it was issued to. If someone other than that person is using the permit, it may be confiscated and person it was issued to will lose the priviledge of having one.
In all states, they have a unique ID number on the permit that links back to the person it was issued to. Some states also list some general identifying information, not the name, but having the sex and year of birth of the person right on the permit does make checking easier.
If no one in the car is over 30 and the permit was issued to a female with a birth year of 1950, it's pretty obvious the permit is being abused.