"...help kids write letters to Santa, making sure they include any relevant details,such as age, shoe size, home address, etc.Don’t worry, we will hide private information from the public. For some inspiration, we’ve included letters to Santa from last year. Make sure envelopes have postage and are addressed correctly, as shown..."
Reference: www.uspsoperationsanta.comMore Reading: Print a North Pole Postmark for your Christmas Crafts