If a shopper closes their browser after selecting the payment method but before actually executing the payment, it can cause reconciliation issues as your platform would never receive the final status of the payment. For this reason we automatically call the shopperResultUrl if it has not been called after 29 minutes. This way your platform can request the final status, being notified that the payment was not processed. A notification will be sent from the gateway to the shop to trigger the get status before the checkout id times out, but only after "pay now" button is clicked in the payment widget.
Technically, if POST /checkouts/{id}/payment was called and GET /checkouts/{id}/payment was not called, OPP sends a GET request to the shopperResultUrl with a resourcePath parameter, suggesting the merchant to call GET /checkouts/{id}/payment. The same applies to /checkouts/{id}/registration.
