There always seems to be confusion regarding coupon usage and the wording
What does "Limit one coupon per purchase" on a manufacturer's coupon mean?
This particular wording seems to be the most confusing for cashiers and has caused many a legitimate coupon deals to go bad. Many cashiers believe that "Limit one coupon per purchase" means that you can only use 1 coupon for your entire order or only one of a particular type of coupon for an entire order. This is not true. I actually means that you can only use one coupon for each item that you are buying. For instance, if I were to buy a can of soup and a loaf of bread and I have one coupon for the soup and one coupon for the bread. I am "purchasing" these items and I have ONE coupon per purchase. The coupon does prohibit me from buying a can of soup and a loaf of bread and using two manufacturer's coupons on the soap or the bread. I can only use 1 coupon per item. It does not mean that you can only use 1 coupon for your entire order. If a cashier tries to convince you that you are only able to have one coupon per order, you can either ask for a manager or explain to them that it would be no different than if you were to each item separately. Also, the limit on a manufacturer's coupon does NOT mean that you can not use a store coupon along with your manufacturer's coupon. Unless either coupon specifically prohibits it or a store has it in their coupon policy, it is fine to use both a manufacturer's coupon AND a store coupon on the same item. Store coupons usually have a limit as to how many items you can purchase with that coupon and it is usually stated clearly on the coupon. Almost every manufacturer coupon has "Limit one coupon per purchase" printed on it.
What does "One per transaction" on a manufacturer's coupon mean?
Fortunately, the wording "One per transaction" does not appear on too many manufacturer's coupons. These types of coupons indicate that you are not supposed to use two like coupons in a single transaction. For example, if I were to buy 2 cans of soup and had two of the same coupons, I would not be able to use both coupons in a single transaction. I would simple do two transaction at the same time. I could only use 1 coupon even though I'm buying 2 bags. (they've since changed that rule).
What does "Limit one per person" on a manufacturer's coupon mean?
It's not likely that you will see "Limit one per person" written on a manufacturer's coupon. It would be almost impossible for them to track whether or not a person is using more than one of a particular coupon. The only time I've encountered this is on free product coupons. You may see this printed on a store coupon. This is especially true with some stores' double coupons. They track this via your rewards or loyalty card. It is more likely that you will see wording like, "Limit one coupon per shopping trip" or "Limit one coupon per day per family" or something similar.
I hope this helps to clear-up some confusion regarding coupon usage.