POST /api/v1/customers/{customerId}/coupons/redeem is deprecated — use POST /v2/customers/{customerId}/coupons/redeem.Integration guide: Coupon Redemption at POS — the redemption lifecycle, offline handling and returns.
Retrieve, reserve and redeem customer coupons at the till.
POST /api/v1/customers/{customerId}/coupons/redeem is deprecated — use POST /v2/customers/{customerId}/coupons/redeem.