Canada Post has a different system.... the posties walk. They deliver mail for 55 Lee Street at 55 Bee Street. The residents of 55 Bee Street write "Delivered to wrong address" on it and drop it in a mailbox. The sorting machine "kicks it out" because the postage has been stamped as used. The next postie in rotation takes the incorrectly delivered mail to the correct addresses at the end of his shift, thereby gaining 4 hours of overtime pay and the use of a postal van overnight. (I used Lee and Bee as an example. Lee Street and Vaughn Harvey Memorial Boulevard work fine.)

That's not the worst of it.