I have had a letter lost which was sent as registered post via Canada Post to Germany. Also, if you don't write the "From:" address on the top left corner of the letter, the officials point out that the from address should be above the "To:" address and on the left side of it. And you must have the PIN/ZIP code written down clearly. Some of the letter addressed to me arrive with a black mark on the bottom of my address with the "Write PIN" written below it. I know it all helps to keep the high-tech postal department work flawlessly. But wonder how they will react if they read this news!