Kids and those in need can write letters to Chris Kringle, and if they do, they just might find some gifts coming their way through the mail.

Here are guidelines to write Santa Claus or to participate in the Post Office’s longstanding Operation Santa program.

If you're interested in adopting a letter, the first step is to create and verify an account on the USPS Operation Santa website. Once verified, you can browse through all the available letters and choose which holiday wishes to fulfill. You can even filter by state, family size and language (English or Español).