CreateOrderRecipient

For voucher products, name/email/mobile are optional delivery details. For top-ups, send every canonical key advertised in recipient_fields by the catalog. PUBG normally requires player_id; Mobile Legends requires player_id and zone_id. Other products may require region_id or arbitrary configured safe keys. Send values as nonblank strings to preserve leading zeros. Missing and unconfigured fields return 422 validation_failed before order creation or fulfillment. Never substitute provider-specific keys such as userId or account_id unless that exact canonical key is configured on the Product.