Cards with messages had been sporadically created and posted by individuals since the creation of postal services. The earliest known picture postcard was a hand-painted design on card, posted in London to the writer Theodore Hook in 1840 bearing a penny black stamp. He probably created and posted the card to himself as a practical joke on the postal service, since the image is a caricature of workers in the post office.

In the United States, a picture or blank card stock that held a message and sent through the mail at letter rate first began when a card postmarked in December 1848 contained printed advertising on it.