Any sort of matter can be copied and reassembled. It can be frozen in time; scanned; and then easily replicated with technology. Or placed within a field that reinforces atomic/molecular bonds. I could have this "counterfeit-proof" money made in a single damn topic. There are no "can't be done" type of things in this RP, and more often then not any technology that you request that is "fool-proof" will either be denied or proven otherwise.
This is more or less what I was gonna say, though I'd like to remind those of you who think an economy where money can be duplicated would fail that there is inflation to account for. If everyone just recreated money prices would only go up until the economy collapses. So it's certainly possible to have an economy in SP, just not for very long -- which brings to question how the Credit, the generally accepted currency by most empires (or at least everyone used to use it, dunno if anyone does anymore) -- works, exactly.
Cap's system wouldn't work. Duplicating would be a level one spell, and would be possible to do without actually using magic on the original, as Hik suggested. Catch-alls don't usually work in this RP. But the question we should ask, while we're here, is how would a true economy work on SP? I like the idea of a credit system (maybe that's how Credits work. They are called Credits after all.). Every citizen/person/whatever has a balance of some sort in a secure location and their transactions result in loss of currency from their balance. More of a debit card, really, rather than a credit card. Just a suggestion.
