The client is tracking everything with google analytics and it all works fine except for one case. There is a type of a product for which inquiry has to be made and at a later point they create a draft order and customer pays the invoice. So what happens is customer lands on their website from google ads or facebook ads, make an inquiry and pay the invoice later on they will see this as a direct sale and not the sale coming from payed ad.
What would be the best way to deal with this? Because they did made the sale thanks to the ads but it is not clearly visible in the report.