Does Vueling require notarised parental consent for a 16-year-old travelling?

[Bubbletea42]

My 16 yr old DS is travelling to Spain and back with a friends family, who are Spanish but live in uk.
They are flying with Vueling. I plan to sign a parental consent form and provide copies of parent’s passports and DS birth certificate.
Whilst this feels like enough, it seems that the issue may be when leaving Spain. Vueling website says 16 yr olds can travel unaccompanied but need parental consent notarised. Is this an airline specific thing? Does anyone have any experience of Vueling and this particular scenario?
Many thanks.

if he’s travelling with his friend’s family who are adults, he’s not unaccompanied, so is this necessary?

what she said. He won’t be unaccompanied

My understanding is that if a child is under 18 and not travelling with a legal guardian/parent, they need written consent.
Spain is especially vigilant apparently and Vueling is a Spanish airline. But maybe others have different experiences?

I flew on my own from and to Spain from the age of 16, including with Vueling. No one ever asked to see parental consent, although I did carry a letter my parents had signed, just in case. I think I only had to show it once, at the UK border.

From the age of 16, you are considered an adult by the airlines. They’re unlikely to ask for a notarised document.

That’s good to know, thank you.