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# promotional_offer_id

The identifier of the promotional offer for an auto-renewable subscription that the user redeems.

```
string promotional_offer_id
```

## Discussion

This field is returned in the JSON response, in the [`responseBody.Latest_receipt_info`](/documentation/AppStoreReceipts/responseBody/Latest_receipt_info-data.dictionary) and [`responseBody.Receipt.In_app`](/documentation/AppStoreReceipts/responseBody/Receipt-data.dictionary/In_app-data.dictionary) arrays.

You provide this value in the Promotional Offer Identifier field when you create the promotional offer in App Store Connect. For more information, see [Set up promotional offers for auto-renewable subscriptions](https://help.apple.com/app-store-connect/#/dev16dfca448).

You can use the promotional offer ID value to:

- Confirm that the sale of the subscription was from a promotional offer.
- Confirm which promotional offer the user redeemed.
- Keep track of the promotional offers that a user has redeemed to limit discounts you offer, according to your business model.

For more information on promotional offers, see <doc://com.apple.documentation/documentation/StoreKit/implementing-promotional-offers-in-your-app>.

---

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