Christmas seals are adhesive labels that are similar in appearance to postage stamps that are sold then affixed to mail during the Christmas season to raise funds and awareness for charitable programs. Christmas seals have become particularly associated with lung diseases such as tuberculosis, and with child welfare in general. They were first issued in Denmark beginning in 1904, with Sweden and Iceland following with issues that same year. Thereafter the use of Christmas seals proved to be popular and spread quickly around the world, with 130 countries producing their own issues.

Wikipedia. CC BY-SA 4.0. Updated Jun 14, 2026.