travelInformation. autoRental. promotion.additionalCouponCode {#travel-info-auto-rental-promotion-add-coupon-code}
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This field notes any rental agency coupons that discount the normal rental rate of the vehicle.

Specifications {#travel-info-auto-rental-promotion-add-coupon-code_Specifications}
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* **Data Type:** String
* **Data Length:** 12

Mapping {#travel-info-auto-rental-promotion-add-coupon-code_Mapping}
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* **REST Field Name:** travelInformation.autoRental.promotion.additionalCouponCode
* **SCMP Field Name:** promotion_additional_code
* **Simple Order Field Name:** autoRental_promotion_additionalCode