My oldest grand daughter Natalie has just finished typing out her letter to Santa. She had a little help from mom but this is pretty much verbatim:
Like many thousands of children in Canada she will be mailing her letter to:
Santa Claus
North Pole
H0H 0H0
Canada
Canada Post has an entire page set up for Canadian children who wish to send their letters to Santa and if they send them in early enough and if they include their return address, Santa will answer each child’s letter. Remember though that this is a busy time for Santa so if you want him to answer you, send your letter in as soon as possible. Details are on the Canada Post web site.