Published: Aug 18, 2010 12:04 AM EDT
Updated: Aug 17, 2010 9:04 PM EDT

PHOENIX (AP) - Maybe the check REALLY was in the mail.

The U.S. Postal Inspection Service is offering a reward of up to $10,000 for help in finding out who stole one of those iconic blue mail collection boxes late Monday or early Tuesday in north Phoenix.

It was recovered - empty - early Tuesday near Interstate 17.