Hey, @kevagc !
I’m Helen from Shopify Support. Thanks for reaching out about this.
Are you seeing these attempted transactions as Abandoned Checkouts? You can check by going to ‘Orders > Abandoned Checkout’ in your Shopify admin.
If so, the best way to find more information about these activities to relay to your third party gateway, is to look at the history of the abandoned checkout.
Payments that do not go through to create an order will show up in this section. Clicking on the payment event will give the reason for the failure, as well as the authorization number that you can share with your payment provider.
Let me know if this helps.