While the program is called "any soldier," the mail is actually addressed to the volunteer soldier. You add "attn: any soldier" below his name, or below your name in the return address field, so he knows the mail is intended for one of his buddies. Here's what the site says:
"There is no US Postal Service regulation concerning "Any Soldier", however there is a DOD Postal Manual (DOD 4525.6-M) Issue #22093 dated 9 January 2003, which states, "a. Mail addressed to "Any Service Member," or similar wording such as "Any Soldier," "Sailor," "Airman," or "Marine"; "Military Mail", etc., is prohibited. Mail must be addressed to an individual or job title such as "Commander," "Commanding Officer," etc."
All of our addresses belong to real soldiers with the addition of an attention line, which is completely legal. The real soldier is aware of, and volunteered for, this program and uses the attention line as notification of what the package is for.
Some postal clerks get confused by this so we suggest to avoid any arguments you simply draw a line through the attention line. The soldier will see this and appreciate your valor at the post office and he/she will still know what to do. We don't advocate getting into an argument with anyone."
from
http://www.anysoldier.com/HowToSend.html
Hope this helps!
