normally when Co have a big deal, they must pass though board meeting to discuss it....... over 50% shares 's director & co sec. should sign on the mintus.
If you be a co. sec. that's no problem when the co work in normal. but if the co. work in grey area then..... you have responsibilities. this is very easy to get trouble when your co get trouble. You must very clear to know the co law & the co. operateion.
So I suggest you to find the co sec firm to do it, because they know everything , they know how risk there are. As I know that there are some co sec frim charge within $1000, better don't take this risk.... because of only save $1000