> For the complete documentation index, see [llms.txt](https://docs.commercelayer.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.commercelayer.io/core-api-reference/2026-05/return_line_items.md).

# Return line items

The return line item object and the allowed CRUD operations on the related resource endpoint

A return line item represents an [SKU](/core-api-reference/2026-05/skus.md) or [bundle](/core-api-reference/2026-05/bundles.md) being sent back as part of a [return](/core-api-reference/2026-05/returns.md). The `quantity` attribute determines how many units are being returned. The total amount to be returned is calculated automatically from the original line item's unit amount, the returned quantity, and any discounts that applied to the original purchase.

{% hint style="info" %}
Optionally, populate the `return_reason` attribute with a custom set of key-value pairs to record why the item is being returned.
{% endhint %}

Once the related return is marked as `received`, you can restock a return line item's SKU by passing the `_restock` trigger attribute — the `restocked_at` timestamp is then set automatically.


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