You've all met Max Rate. Oh yes, many times:
"Lost ticket pays max rate."
I'll wager that every parking garage and toll road on the planet has this policy. I'll further wager that "Lost ticket pays max rate" has been translated into more languages than any phase except "Men's Room" and "Women's Room".
And yet- what would be the effect on customers if a parking garage had this policy instead:
"Lost ticket? Please simply tell us when you entered the garage. We trust you."
(If there was competition- if there were several parking garages in the area- I know which one I'd choose, and talk about!)