# 10411 (/api/nvp-soap/troubleshooting/10411)



Returns from the following NVP/SOAP API calls:

* `SetExpressCheckout`
* `DoExpressCheckoutPayment`
* `CreateBillingAgreement`

## Cause [#cause]

The API returns this error when the current Express Checkout session has expired. This error indicates that the token value is no longer valid, typically because the session has exceeded its time limit.

## Impact [#impact]

The payment process is halted, preventing the customer from finalizing their purchase. This can lead to a poor customer experience and potentially lost sales if the issue is not resolved promptly.

## Resolution [#resolution]

* **Inform the customer**: Communicate to the customer that the Express Checkout transaction has expired and must be restarted. Display an error message explaining the situation and provide a button that enables the customer to restart the Express Checkout flow. Redirect them back to PayPal to approve the use of PayPal again.
* **Restart the checkout process**: Initiate a new Express Checkout session without reusing the expired token value in the SetExpressCheckout request. Since you already know the final `OrderTotal`, ensure that you update the value for that element if necessary. Additionally, review and update the values for `ReturnURL` and `CancelURL` to ensure they are accurate.
* **Check token validity**: By default, the token is only valid for 3 hours. If your business requires a longer token validity period, contact PayPal customer service to request an extension of the token expiry time.
* **Enhance user experience**: To minimize customer frustration, streamline the process of restarting the checkout session. Ensure that the customer can easily resume their purchase with minimal steps and clear instructions.

## Upgrade [#upgrade]

The NVP/SOAP API integration method is deprecated. You can find more information about our latest integrations from the following resources:

* [REST APIs](/api/rest/)
* [PayPal Checkout](/api/rest/integration/orders-api/api-use-cases/standard/)
* [PayPal Developer homepage](/)

## Additional resources [#additional-resources]

* [Express checkout token](/api/nvp-soap/set-express-checkout-soap/)
* [NVP/SOAP integration](/archive/express-checkout)
* [NVP/SOAP error codes](/api/nvp-soap/errors/)

> **Info:** You can reach out for support at [paypal-techsupport.com](http://www.paypal-techsupport.com).