Hello, on Friday a booked a car in Madrid - t called before booking to confirm that it will be possible to pick up the car about 00:30 - the lady confirmed that if I in browser put the hour and the car appeared it is no problem.
but only at 23.30 - and we land at 00:00
During Covid-19 Sixt at Madrid Airport close at 23:30 . If you inserted your flight number when asked to do so, during the online booking process, then normally the staff will wait up to an hour more.
We will be at the airport at 00:00
Yes that is the latest time 23:30. If you inserted 00;30 when booking you would have not seen any available cars. All I can suggest is you call SIXT directly (information contained within your voucher) and ask if they would wait.