USPS

The United States Postal Service, also known as the Post Office, U.S. Mail, or Postal Service, is an independent agency of the executive branch of the United States federal government responsible for providing postal service in the United States.

The United States Postal Service used a direct mail marketing offer to reach consumers just in time for the holiday season with multiple offers in one mailpiece. From holiday stamps to special gifts to tracking packages and a touching movie about Operation Santa, this best direct mail campaign delivered.

Source: Who's Mailing What!