Coupons only apply to an invoice's total balance, no longer applying to zero-cost invoicesBreaking changes
What’s new
Changes coupon behavior so that applying an amount-off coupon to an invoice doesn’t increase the Customer account balance if the discount is greater than the invoice amount. Coupons are ignored, and not counted as redeemed, when applied to zero-cost invoices. This change doesn’t apply to coupons created on an earlier API version.
Impact
This change to coupon behavior prevents unexpected increases in customer account balances, and ignores coupons on zero-cost invoices.