Giant is one of the most confusing stores in the Philadelphia area when it comes to their coupon policy.
As far as doubling coupons... they seem to merely "follow the lead" of the local stores in the area.
In the immediate Philadelphia area (where I live), they practice "full doubles"...meaning a $0.75 coupon has a doubled value of $1.50. But the farther they get from Philadelphia and the farther they get from stores that offer "full doubles"? Their policy changes. Some stores only offer "up to $1 doubled value" (meaning a $0.75 coupon has a doubled value of $1).
Because I live near a store that practices "full doubles" and because my statistics tell me that the majority of my readers that are searching for Giant deals also live in the same area, all of my weekly Giant of PA coupon matchups are based on "full doubles". If your store doesn't double as well as my store does, please adjust your weekly Giant shopping plans accordingly (and check with your local store to see their policy)
That being said - there are a few rules that are universal to Giant:
Giant only doubles 1 like-coupon per transaction. If you have, for instance, 5 coupons for $0.50/1 Superpretzels and they are on sale for $1.79 (as happens often), only the first coupon will double. If you have 5 coupons and want to get 5 boxes for $0.79 each (after doubled coupon), you will need to do each in a separate transaction. PLEASE NOTE: I have done similar transactions in the past and I simply told the cashier "sorry to do this to you, but I need to split these transactions because of the ridiculous Giant coupon policy". The cashiers understand...you aren't blaming them for a policy over which they have no control!
Most Giant stores will only accept 4 like-coupons per transaction. So - if you have 7 $2 Wisk detergent coupons one week, you will need to split your transactions or the register will reject your coupons.
Giant requires manager approval for any coupon with a value greater than $5. For most people, this isn't an issue. But, because of my job, I often get coupons for free items (meat, frozen prepared dinners, etc) with a value greater than $5. Come to think about it, there was a recent BOGO Birds Eye Voila coupon (value of $8.99) in the weekly coupon inserts! Please don't be upset by them needing to call over a manager to approve your coupon. Legitimate high-value coupons have security features in place and most managers recognize them immediately. It may be an extra minute of your time, but they are just covering their bases against fraud.
Giant does not accept Internet coupons for FREE products and many of them have stopped accepting Internet Buy One Get One Free coupons. This is due to rampant coupon fraud. The problem arises when you sign up for a coupon for a free item that is mailed to you and it LOOKS like an Internet Printable. However, those mailed Free Item Coupons are almost always printed on the Security Paper. I have had many a cashier tell me that they can't take my coupon because it was an Internet printable....but once I flipped it over and showed them the "extra special paper", they accepted the coupon. And if they don't? There is always Target (I never have a problem with Target taking my Free Product coupons...your mileage may vary!)!
Giant WILL accept $ off Catalina coupons with another store logo on them. This is completely unadvertised, but I can tell you this from experience. As long as the Catalina coupon has a "remit to" address on it, it is a manufacturers coupon and the store WILL accept it. I have sought out managers in my local store to confirm this in advance of hitting the checkout line, as well as had some "fights" with cashiers who told me they couldn't take it (my response? "scan it...if it doesn't work, then we will argue"...and it always scanned without a beep!)
Please remember that Giant gives their managers latitude to make up their own coupon policies to fit their stores. If you have any problems with using your legitimate coupons at Giant, please contact Giant Corporate to register a complaint (or compliment) HERE