Ability to Remove Coupon and Clear Manual Discounts from SyrveCard in Order

Starting from V9Preview3, it is now possible to remove a coupon and clear manual discounts from SyrveCard in an order.

To remove a coupon, use the method ChangeOrderSyrveCard5Coupon with ‘null’ as the second argument.

To remove a manual discount, use the method ChangeOrderAppliedSyrveCard5ManualConditions with ‘null’ or an empty List<Guid> as the second argument.