If you're encountering additional script in the additional details field of the Order section, several factors could be at play.
- Some merchant’s international orders are being handled by a third-party app: “Zonos Duty and Tax.” It seems this app has a very particular way of handling discounts: Use discounted amounts in rate requests
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The additional details and notes are being added by the Zonos Duty and Tax app, which can be observed in the order timeline.
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Some other international orders show that Zonos adds the additional details but with an empty array. This order has the same promo code but for some reason Zonos does not add the same details.
In summary, the additional details being added are actions performed by the third-party app "Zonos Duty and Tax." I recommend that the merchant contacts their support team to address how to prevent these additional details from being added, if possible.