Goldcar are to be avoided. I don’t know whether they get a backhand by the Portuguese govt but they do their best to ensure you’re not aware of the via verde system so that you get a 50euro fine before you know what’s hit you. No phone number for the relevant Goldcar office and nothing in writing in the contract so it’s their word against yours (we told you/no you didn’t) and that’s your lot. For those who aren’t aware, always use the green V lanes on toll motorways and ensure your rental car is activated for it. Good luck - and don’t use them.