MarketPress, where do I find the return url for the store checkout?

Multisite venue of Shops...

I recall coming across a url to provide to PayPal, to redirect successful transactions back to my site. The url would have to work for every shop's store checkout process - it may not go back to the shop itself, or can it?

There is a MarketPress / Settings / "Message" / Order Complete Page - text box for each shop. What url is this? Not sure if I am suppose to create a new Pro3 page-builder template to add its ID# in here for every shop.

I am just setting the Paypal sandbox up, so am not sure what the order complete page even looks like.

Look forward to your advice :slight_smile: