There is no law in Florida that states a company cannot double or triple coupons. This is an excerpt from the Fla Dept of Revenue on how sales tax is to be collected on products using coupons (notice the part in bold):
Retailers' Coupons. When a retailer issues a store coupon, the retailer is reducing the sales price of the item purchased with the coupon by an amount equal to the face value of the coupon. The retailer reduces its profit on the sale, and the value of the coupon is not recovered from any other party. This type of coupon is a retailer's discount that is deducted from the sales price before computing the sales tax
. Any additional value assigned by the retailer, such as to double or triple the coupon, is also excludable from the sales price.
- Example: A supermarket publishes in an advertising flyer its own store coupon offering $0.50 off the purchase of a particular laundry detergent. The detergent sells for $4.99. The sales tax is computed on $4.49 - the sales price after deducting the value of the coupon.
Example: A supermarket advertises a weekly special on a particular laundry detergent, reducing the sales price from $4.99 to $3.99. A customer purchases the laundry detergent using a manufacturer's coupon with a face value of $0.50. In addition, the supermarket will double the coupon, to increase its value by another $0.50. The final price of the laundry detergent to the customer is $2.99. The sales tax is computed on $3.49 ($4.99 minus the sales price reduction of $1.00, minus the $0.50 from the retailer doubling the face value of the manufacturer's coupon). The value of the manufacturer's coupon is not deducted from the sales price when calculating the tax.