"After the event you might end up with gold or lead it all depends if your banker believe in transmutation or not (and if transmutation is actually achievable which will be determined by the best alchemists of the kingdom that need to agree together).
So all in all the guild of merchants recommend that you don't accept gold as a payement on the last day before new moon (and for a few day after that), because you wil not be able to tell if you are getting real gold or lead during that period.
Well to be honest it won't technically be lead you would get but forked gold, a gold that could be gold but isn't until the alchemists say so. But you shall still be able to use it in a limited way with people who believe in the same alchemists dissidents.
It's totally normal if it's sound complicated, it's magic after all!"