Which Coupons Are Applied to the Invoice?

If you enable Multiple Coupons Per Account and multiple coupons are redeemed on an account, we will apply all coupon discounts that are eligible to each purchase invoice. This is the default behavior of the feature and cannot be configured to limit one coupon per invoice. If you would like to limit purchases to one coupon discount, but would like to allow multiple active coupons on customer accounts, use our Subscription Level coupon option to tie a coupon discount to a specific subscription.