According to the Universal Postal Union (UPU)'s 2007 study and survey of national postal operations, the United States Postal Service (USPS) has the oldest Santa letter answering effort by a national postal system. The USPS Santa letter answering effort started in 1912 out of the historic James Farley Post Office in New York, and since 1940 has been called "Operation Santa" to ensure that letters to Santa are adopted by charitable organizations, major corporations, local businesses and individuals in order to make children's holiday dreams come true from coast to coast. Those seeking a North Pole holiday postmark through the USPS, are told to send their letter from Santa or a holiday greeting card by 10 December to: North Pole Holiday Postmark, Postmaster, 4141 Postmark Dr, Anchorage, AK 99530–9998.