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Hi @luofang-93,You can use Process Return Request call(https://developer.ebay.com/devzone/post-order/post-order_v2_return-returnid_decide__post.html) of post order API. Please refer notes section of below doc:https://developer.ebay.com/Devzone/return-management/CallRef/provideSellerInfo.htmlBest Regards ,eBay Developer Support
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