About those mailing addresses...some of the two-letter codes for states in the U.S. can be difficult to decipher by folks who live elsewhere. It could be useful for your Secret Santa to know what is meant by MI, MT, ME, MS, MN or whatever. A small note, separate from your mailing address could be helpful. Just a thought...

A. B. See 123 Fourth St.
San Mateo, CA 56789

(California)