Can checkouts/orders be tracked via a custom property in a cart permalink?

[r3digital]

If I create a cart permalink and pass a value into one of the `note`, `attributes` or `ref` parameters, are any of these passed back via the `checkouts/*` and/or `orders/*` webhook event payloads, so we can keep track of the checkout/order status in an external system?

[r3digital]

I have had confirmation from Shopify support that none of the `note`, `attributes` or `ref` parameter values are included in the `checkout` or `order` webhook event payloads.