The other thing I noticed, only after I had read the letter through, was the absence of a post-office box address.

NPR: 'Ancestor Stones:' Life and War in Sierra Leone

If you're unsure whether an ad is sincere, you can protect your identity when responding by providing a resume with a post-office box address instead of your home address, says Ms. Dixon.

WSJ: Fake Job Postings Dot Popular Job Boards

The mailman delivers to a post-office box about 10 miles away at the only restaurant-bar in Pioneertown, a tiny dot created by Hollywood in the 1940s as a backdrop for filming westerns.

WSJ: The Do-It-Yourself Desert Retreat

It certainly helps to get a movie some good post-opening publicity if it does gangbusters at the box office.

FORBES: When To Judge Whether a Film Like 'X-Men: First Class' Is a Hit

Front companies amounting to little more than an offshore post office box have been created to perform end-runs around official efforts to stem the money flowing to those who are trying to kill us.

CENTERFORSECURITYPOLICY: Terrorism��s business partners

Taxpayers who reported and paid tax on all their taxable income but did not file FBARs, should not participate in the OVDI but should merely file the delinquent FBARs with the Department of Treasury, Post Office Box 32621, Detroit, MI 48232-0621 (and attach a statement explaining why the reports are filed late).

FORBES: D��j�� vu--Yet Another IRS FBAR Voluntary Disclosure Initiative