Well, if you didn't know you had counterfeit bills and you really had nothing to do with it, you'll probably get away with it. But then I wonder where you got the counterfeit bills from, most likely you also got them from someone. Ottawa Criminal Lawyers can help you with your problem. I had a similar situation once too, I once tried to pay with a counterfeit bill too and didn't notice it, but the amount wasn't much and I just laughed with the seller.