My son’s insisting that I can send him postcards to his name and 9-digit zip code, with no street address included. I don’t believe him. What’s the story and how do zip+4 zip codes work?
My son’s insisting that I can send him postcards to his name and 9-digit zip code, with no street address included. I don’t believe him. What’s the story and how do zip+4 zip codes work?