I went to the front desk at La Cabana the other day wanting to get change for a $5 bill to use for the laundry. I had an older $5 bill (without Abe's face hiding in the bill). They sent me to the convenience store (onsite) to change it. The front desk said they couldn't change my OLD bill. I recently did read an article about someone removing the ink from a $5 bill and reprinting it as a $100 bill. You could still see Abe's photo when you held it up to the light. I wouldn't think there's too many people counterfeiting $5 bills.