Should I use regular paper for my coupons?

Question

I am making $500 off coupons for my dealership. Should I use security paper for the coupons? I'm not really concerned with people making extra copies. I don't want people trying to alter the expiration date or amount of the coupon. Can I be held accountable if I know it has been altered?

Answer 1

I think just using security paper would be the safer route