(CNN) -- If you want a letter postmarked from the North Pole your window of opportunity is still open, but not for long.
This is something the U-S Postal Service offers every year. It allows holiday letters and cards to be stamped with "Santa" as the sender. The deadline is Monday, December 10.
To take advantage, you need to place the card or letter from Santa in its envelope with first class mail stamps.
You should also have the return address as "SANTA, NORTH POLE".
Place the card in a larger envelope with the correct postage and address that to North Pole Postmark Postmaster, 4141 Postmark Drive, Anchorage, Alaska 99530.
There are also 48 post offices with holiday related names. To see the full list, go to the U.S. postal office website USPS.com.