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# offer

The subscription offer that the customer redeems outside of your app.

```
let offer: Product.SubscriptionOffer?
```

## Discussion

The system populates this value if the customer redeems a [`winBack`](/documentation/StoreKit/Product/SubscriptionOffer/OfferType/winBack) offer type outside of your app. Add this offer to the purchase options. For more information and a code example, see the [Handle win-back offers redeemed outside of your app](/documentation/StoreKit/supporting-win-back-offers-in-your-app#Handle-win-back-offers-redeemed-outside-of-your-app) section of  [Supporting win-back offers in your app](/documentation/StoreKit/supporting-win-back-offers-in-your-app).

---

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