The author is unknown. The story was posted on the groaners listserv.

Late for work already, I was annoyed to find a strange car in my reserved parking space again. After locating a spot far away, I stormed into my office determined to have the car towed. As the morning wore on, however, my anger mellowed, and I decided to give the driver another chance.

During lunchtime, I went outside and left this note on the driver’s windshield: “Please don’t take my parking space. If you do, and your car disappears, don’t say I never towed you!”