We do this little thing to protect against someone charging us more when we swipe with a card for a good or service that doesn’t require tip.
Sometimes the receipt comes with a “tip” write-in area and we’re paying for say, beer at the store. Now, by reflex, we always put a slash through the tip box and write in the total before signing.
If you don’t, it’s possible someone could write in a tip later for themselves and charge you for it. Having worked in a restaurant at one point, we know it can happen.
Probably means we’re not living our life to its fullest potential, but everything has a price we guess. — BEN POPKEN