# How do I retrieve Stripe customer data after web checkout?

Learn how to access the Stripe customer ID and email after a user completes a web checkout purchase.

Context [#context]

After a user completes a web checkout purchase via Stripe, you may need to access their Stripe customer ID and email for integration with your backend systems or third-party services.

Answer [#answer]

Use the `didRedeemLink(result:)` delegate method to access Stripe customer data when a redemption link is successfully processed.

Accessing Stripe customer ID and email [#accessing-stripe-customer-id-and-email]

When the redemption result is successful, the `RedemptionInfo` object contains a `PurchaserInfo` with the customer's email and store identifiers:

```swift
func didRedeemLink(result: RedemptionResult) {
    guard case let .success(_, redemptionInfo) = result else { return }

    // Get the customer's email
    let email = redemptionInfo.purchaserInfo.email

    // Get the Stripe customer ID and Stripe purchase identifiers
    if case let .stripe(customerId, subscriptionIds) = redemptionInfo.purchaserInfo.storeIdentifiers {
        print("Stripe Customer ID: \(customerId)")
        print("Stripe purchase IDs: \(subscriptionIds)")

        // Send to your backend or analytics
        sendToBackend(
            stripeCustomerId: customerId,
            email: email,
            subscriptionIds: subscriptionIds
        )
    }
}
```

> **Note**

The `subscriptionIds` value keeps its legacy name for compatibility. For Stripe subscriptions, it contains `sub_` IDs. For Stripe one-time purchases, it can contain Stripe Checkout session IDs.



What happens if the user kills the app during checkout? [#what-happens-if-the-user-kills-the-app-during-checkout]

If a user completes the Stripe checkout but terminates the app before returning, the `didRedeemLink(result:)` callback will not fire. However, their purchase is not lost.

**Recovery mechanisms:**

1. **Redemption email**: After a successful Stripe checkout, Superwall automatically sends the customer an email with an activation link. When they tap it, your app opens and `didRedeemLink` fires with the Stripe customer ID and email.

2. **Plan management page**: Users can visit `https://{yoursubdomain}.superwall.app/manage`, enter their email, and receive a new redemption link.

3. **Automatic entitlement sync**: The SDK polls for web entitlements when the app enters foreground, so subscription and entitlement status updates automatically. However, this sync only updates access and does not trigger `didRedeemLink`, meaning you will not receive the Stripe customer ID or email through this path.

> **Warning**

To programmatically receive the Stripe customer ID and email, the user must tap a redemption link (either from the automatic email or the manage page).



Stripe metadata [#stripe-metadata]

Superwall automatically includes your app user ID in Stripe checkout metadata. For subscriptions, it is also included in subscription metadata. The key `_sw_app_user_id` contains the user ID you set via `Superwall.shared.identify(userId:)`.

This allows you to correlate Stripe purchases with your users directly in Stripe or through webhooks.

Related [#related]

* [Post-Checkout Redirecting](/docs/sdk/guides/web-checkout/post-checkout-redirecting)
* [Stripe One-Time Purchases](/docs/web-checkout/web-checkout-stripe-one-time-purchases)
* [How do I disable the activation link email for web checkout?](/docs/support/web-checkout/3969573187-how-do-i-disable-the-activation-link-email-for-web-checkout)
* [Web Checkout FAQ](/docs/web-checkout/web-checkout-faq)