# 10485 (/api/nvp-soap/troubleshooting/10485)



Returned from the following `NVP/SOAP` API calls:

* `DoExpressCheckoutPayment`
* `GetExpressCheckoutDetails`

## Cause [#cause]

An Express Checkout payment failed because the buyer was not directed to PayPal and did not authorize the transaction.

## 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]

* **Notify buyers:** Inform buyers about the error and provide steps to resolve it.
* **Redirect to PayPal:** Use the token from `SetExpressCheckout` to send buyers to the PayPal login page. After logging in, they see the transaction details on the payment review page, where they must approve the payment.
* **Streamline the process:** Make redirection smooth and user-friendly. Provide clear instructions and minimize steps to complete the payment.

## 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).