I thought stores all took them - they're supposed to be regular manufacturer's coupons, right?
It really depends on the store policy. For example, I don't think any convenience store will take ANY coupon unless it's their own.
I know McKay's has said they won't take them, and from time to time Wal-Mart has refused them. It's frustrating, because I plan my trips to stores based on redeeming coupons and combining them with sales.
As far as I know, internet coupons have a bar code on them and they are good. However, I can see that they can be indistinguishable from a copy of a regular coupon printed on paper or Xeroxed.
I suppose I don't really know how the redemption process works for the store. I presume they get the difference or part of the difference of the sale, and if the manufacturer doesn't reimburse them because the coupon is invalid, they eat the difference.
You know what's weird? Most manufacturer's coupons do NOT have any means of checking the expiration date other than the cashier eye-balling it - meaning, if you use them on self checkout, no one will know if you use an expired coupon. Seems to me, THAT is a greater risk than a forged coupon.