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# offerIdentifier

The string identifier of an offer that you create in App Store Connect.

```
string offerIdentifier
```

## Discussion

The `offerIdentifier` is a string that you provide in App Store Connect when you set up an offer. All offer types ([`offerType`](/documentation/AppStoreServerNotifications/offerType)) have offer identifiers, except for introductory offers.

For more information on offer codes, see <doc://com.apple.documentation/documentation/StoreKit/supporting-offer-codes-in-your-app>. For more information on promotional offers, see [Set up promotional offers for auto-renewable subscriptions](https://help.apple.com/app-store-connect/#/dev16dfca448).

---

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