You park your car. You pay your fee to park your car. You go and do whatever it is that you need to do. You’re a bit longer than you thought you would be. You go back to where your car was parked. And there is no car. All there is, is a note on the pavement, in white chalk with your registration plate number and ‘Claim at Amorsolo St’. But what if it rains? The chalk would get washed away, and then how do you find your car?