On Your Side Investigates uncovered an increase in criminals stealing postal keys to unlock your mailbox and steal your identity.

USPS changes are aimed to cut costs. Will it take longer for your mail, packages to be delivered? What we know about new delivery standards.

USPS already has a map online that will let customers see how long it will take to deliver mail from one zip code to another. Customers also can look up service standards at usps.com. The next ...

The mail code system increases sorting speed and reduces errors. Like zip codes on U.S. mail, campus mail codes are the primary factor determining where a piece of mail is delivered. The Evanston ...

The mail code is a four-digit number associated with a campus address. Evanston campus mail codes are the same as the plus-four portion of the U.S. Postal Service's ZIP + 4 codes. Chicago campus mail ...