And what you are afraid of is that you would become personally liable for the debts of the business.  No, just because you have the authority to sign the checks does not in and of itself make you personally liable for the debt of the corporation.  I would, though, be careful abut just d=signing off on anything that oyou are asked.  If you feel that a bill is a little fishy then I would bring it to the attention of your boss and maybe request that the higher ups actually sign the check.  Hey, you never know. But it is better to be safe than sorry and to make sure that everything is on the up and up. Good luck to you.