Sarah Metcalfe parked in a handicapped space, and came back to find this note.

Like many sufferers of fibromyalgia, Sarah Metcalfe of York, UK, doesn't look disabled. Her symptoms come and go unpredictably, but when they flare up, they're severe. Pain, fatigue, stiffness, disorientation, and stomach bloating are all common. For this reason, fibromyalgia entitles people in many countries, including the US and the UK, to a handicapped parking permit.

Sources: UPI | Sarah Metcalfe