[RogerBW]

Looking at my archives, I see no character with Counterfeiting who doesn't also have Forgery. I don't believe Counterfeiting has ever come up in a game.

In GURPS 3e, Forgery included banknotes, and I think having two separate skills doesn't necessarily make a great deal of sense. I know Goblins introduced Uttering of Base Coin, and I'm guessing that its presence in Compendium I is why we got Counterfeiting as a distinct skill, but the idea that you use different skills for money and everything else is kind of strange. Surely "currency" ought to be an optional specialisation of Forgery, the same way "passports" or "bearer bonds" would be? I will probably house-rule this in future games that I run.

Using the same skill to create the fake currency and to pass it as real (which is what Uttering actually meant) just seems downright wrong to me: getting people to accept your fakes without question is surely Fast-Talk or some other interpersonal-related task, and in real criminal circles is often done by completely different people from the actual counterfeiters.