COURIERS: Stop asking "How did we do?" every single time you deliver something.
If the thing was delivered, congratulations, well done on participating, have a sticker. No medal because delivering things is your raison d'etre, after all. It's what we pay you for.
If it was damaged, broken, late or not delivered at all - THEN ask me how you did. I will gladly explain in short, easy to understand words.