Go to a nice stationary store and buy a real nice envelope...
Heavy Bond.. Texture.. Buy a calligraphy pen..
Take the time to disguise your handwriting by addressing it to yourself using calligraphy
Send the self addressed stamped envelope in a bigger envelope (include a couple of dollars stamps for return postage) to:
It goes to Canada Post. Explain in a personalized Santa letters short letter what youd like Santa Claus Letter them to do.
THe will send it back franked... North Pole H0H 0H0
You will have to explain to your kids that Santa lives in Canada...
Bu it should fix your quandry..