How to pay Portuguese E-toll after the event

[Knight_Ind_2000]

Hi

I've just spent a few days riding through Portugal (on my UK registered motorbike) blissfully unaware of the electronic tolls (ie the toll roads with no physical toll booths).

Is there a way of paying what I owe online?

I have spent an hour or so googling this with no luck. Most advise not to do anything on the basis that the Portuguese authorities don't chase foreign vehicles for payment. But I'm happy to pay if there's a way of doing so.

Thanks!