As it is on most webshop's you can get a pdf or download a pdf that shows customer what was bought.

I have often called or mailed a shop for the invoice later and then got it again by mail, or some you can downloaded these through a customer portal.

This is imho a very basic webstore option.

Have i missed this in x5? If not can you make an option like that?
I think it will be a very usefull item for all shop customers / users.

Thanks!