A small deck, a hard-to-track tax
Playing cards were easy to slip into a letter: compact, valuable enough to attract taxes, and difficult for postal officials to distinguish from ordinary paper. In some early postal systems, authorities therefore taxed decks sent through the mail or barred them outright. The rules were not simply about postage. They made the postal route harder to use for moving cards without paying taxes imposed on them.
The same restrictions could serve a second purpose. Card games were associated with gambling, and limiting the circulation of decks gave authorities another way to discourage it. A postal ban could prevent a deck from being sent at all; a tax could make sending one more costly and visible.
Why the mail became part of the problem
The tension came from the mail’s convenience. A letter could carry a deck far from the place where it was bought, while postal workers had to process huge volumes of correspondence. Checking every packet for taxable goods would slow that system, so a narrow rule aimed at a recognizable item could be easier to enforce than inspecting everything.
That did not mean every postal system treated cards the same way, or that every restriction had the same motive. The rules varied, but they show how governments used control over the mail to police both commerce and conduct. Even a humble deck could become a test of whether a public service was also a channel for avoiding taxes—or spreading an activity officials wanted to restrain.
