Never again!
I returned the rental car in Valencia exactly according to Drivalia's instructions: I parked it at the designated location and handed over the key to a person designated by Drivalia. The car was undamaged at that time, which I can prove with photos and videos taken immediately upon return.
Subsequently, I received a damage claim of €517 for two instances of paint damage that were allegedly discovered 5.5 hours after the car had been returned. During that entire period, the car was under Drivalia's responsibility, not mine.
Despite emailing my photos and video evidence, Drivalia kept asking for proof, while my substantive questions went unanswered. It was as if they had not really read my emails. After submitting an official complaint, I was even told that there were suddenly four damages instead of two and was again asked to provide evidence. Furthermore, my email was not addressed in any substantive way.
Moreover, Drivalia states that a renter remains responsible for the vehicle until an employee has inspected it. In my case, that would mean well over 5.5 hours after the end of the rental period. This is not stated in the terms and conditions, nor was it ever explained to me when I picked up the car. Because you no longer have control over the car after returning it, I would never have agreed to such a condition.
Therefore, I asked by email where in the terms and conditions this is stated, or on what contractual or legal basis a renter can be held liable for damage that is only identified after the car has been properly returned. I also asked why the car was not inspected until 5.5 hours after its return.
Because the number of reported damages keeps changing and my questions remain unanswered, with no further responses to my emails, I have serious concerns about the way damage claims are handled and suspect that this may not be an isolated incident. I am surprised that insurers are not taking action on this.
If Drivalia fails to provide a substantive response, I will submit this case to the European Consumer Centre.
My advice: stay away from Drivalia.