In all seriousness, it IS inevitable it will happen from time to time. Billions of pieces of mail get delivered every day, and like with every business, there are some crappy employees. Should it happen? No. Is it acceptable? No. But it does on a rare occasion, and the only way to deal with it is to take your business to a different carrier which would most likely be much more expensive, or just deal with it. I know it sounds harsh, but unfortunately, there's some unscrupulous mailmen about. The Royal Mail in the UK are very quick to refund as long as you have waited their maximum guideline delivery times. They send you a form, you fill it out, you receive your money back.