> This page is for Afterpay Button Documentation.

> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://developers.afterpay.com/llms.txt.
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# Complete the Express Checkout Process

After retrieving the order details, you can complete the order immediately, or continue the checkout on a review page. To complete the transaction immediately, make use of Integrated Shipping with the Buy Now feature.

If you intend to continue the checkout on your site, you should:

* Pre-fill your review page showing Afterpay or Clearpay (UK) as the payment method

* Allow the customer to select a delivery method (unless using Integrated Shipping)

* Optionally offer the ability to change order details and enter promo codes

* Display the Afterpay or Clearpay (UK) checkout widget on the final review page or at all steps of your checkout

> **Warning**
>
> The [Afterpay Checkout Widget](/afterpay-button-documentation/guides/express-checkout/checkout-widget) is mandatory if your checkout makes any changes to the order total after returning to your site.