Unable to launch Adwords Tag in Tag Manager if referral is Paypal
I'm using Tag Manager to launch my Adwords conversion tag.
It must trigger only if purchase was made via Paypal.
The problem is that Referral variable is impossible to read when referral comes from Paypal. That is because Paypal server don't send that variable.
How can I workaround to launch my tag only if referral is Paypal but using another trigger instead?