It’s possible to include your own upsell functionality after the purchase is complete in the checkout. This is done with a call to replace invoice for the products of the customer's choice.
- When the purchase is completed and the checkout information is fetched, the response body will contain a
- Use the
InvoiceNofor the replace invoice call. Remember to send along all existing invoice rows with the new upsell articles.
The replace invoice call is only possible for credit purchases with a pending invoice. This means that invoices that are auto activated cannot use the upsell functionality.