Gets the ISO 4217 three letter currency code for which the PromotionCode is valid.
Typically, the default currency for the customer is returned herein. The currency returned herein, the Promotion-Code is guaranteed to be valid for. But normally, the Promotion-Code can be used for other currencies too.
PromotionCode Class | SunnyCars.Schema.Osi.WsReservation.V4 Namespace