Forgery is opposed by Forgery, so either the general inspects it himself, in which case it probably works unless the general is a lot more of a literary man than we thought, or he hands it off to a lower-level lackey who may or may not be able to tell if it's genuine but will probably have a bonus closer to mine than the general's skill bonuses would be.
It eats up time inspecting the document either way, so that's always useful. I just don't want to delay us much longer.