A letter without a ZIP code may not reach its intended destination. That is because of the way addresses are read by automated postal systems.

ZIP code boundaries have long been a pain to some folks in Pinellas who complain that although though they live in one city, their mailing address lists the name of another town. Simply put, ZIP ...

LAST summer we at Time Inc. made some 20 million changes in our mailing lists to put ZIP code numbers on the address labels of all U.S. subscriber copies of our magazines. We put the ZIP on all ...