Better late

 Kieran and I sent this letter to Santa off on the last possible day.  Dec 17.
Apparently you don't even need to attach a stamp.
Just send it to:

Santa Claus
North Pole
H0H 0H0
Canada

 And a letter will be sent back.

It finally arrived on Jan 5-2013.
I didn't think we got it there in time.
And I had not banked on a response letter from Santa.
But sure enough.  Canada Post came through.

And the letter did in fact arrive.  After Christmas, but better late than never.