I want to share my experience here so other people won’t have the same bad surprise.
I’ve used my VISA Revolut card for pre-authorization in an hotel in Buenos Aires, Argentina. I needed to stay 6 days for business over there. After 4 days, I realized that the transaction had switched from “Pending” to “Completed”, so the money was gone for good. When paying for check-out, I asked if there was a mistake here. The manager said it was normal and a refund would be sent 2 weeks later.
…It never arrived. I contacted the Revolut Support = “You must contact the vendor to ask for refund, the transaction has been completed”. I contacted then the hotel = “We called VISA and checked our account, we don’t see anyhting”. It went on and on like in a ping pong game for a while and after 1 month and a half of pressure (Revolut did raise a dispute with the hotel actually), the manager came back to me and “realized” that the transaction shows up in his book on the fourth day of my stay, not the first day (not sure if he’s not lying here).
My point is that it’s possible than after a few days, because of technical glitch (pre-paid debit card weakness?) or human bad intent, the pre-authorized amount can be sucked out of your Revolut account without your consent.
Word to the wise: use your regular card for the pre-authorization, use your Revolut card for payment when leaving (or cash during the week-end CET time in a country with no possibility to add an account in your Revolut app)