Purpose Initiates a formal Shopify Return on a delivered order — specifying which line items to return, quantities, and reason. This creates the return record in Shopify's native returns system (distinct from simply issuing a refund). Used by support agents when a customer contacts them to return delivered items. The return record enables tracking, warehouse inspection, and exchange/refund resolution downstream. Note: requires the order to be in status. For orders that haven't shipped yet, use instead. For already-returned items needing a refund, use . Prerequisites - - API scopes: , Paramete…