Navigator Tokens? For an organization that is well know for charging "all that the market will bear", that makes tokens sound more like "subway tokens", "bus passes", or like those green dot credit cards (i.e. you fill them up as a pre-pay sort of thing).
They would give out tokens instead of refunds. Or for "pre-paid" jumps.
But tokens would never be considered currency, jumps and other Navigator services are way way too expensive for that.
But, as I said above, if there were any organization/government that would create something close to a universal currency, it would be the Navigators.
Again, this goes back to the Navigator mindset of charging for every possible thing.
By creating their own currency, they can pay their individual Navigators in that currency, who would then spend it every place that they went.
They can also give an automatic discount to any currency that is not Navigator currency, allowing them to actually charge more (due to the "exchange rate"). It also makes their currency more sought after (by those who use Navigators frequently), and this could maybe create a business in and of itself.
Now chances are that there is no true universal currency simply because there are too many different culture with far too many different methods of payment. IIRC, some culture still indulge in bartering, even on Emer, let alone some of the more far flung cultures...