Upvote:4
I'm guessing here
- Booking.com will try to collect the money from the Revolut account. This will trigger the following events: https://www.revolut.com/en-US/help/my-accounts/managing-my-account/what-happens-if-my-balance-goes-negative
- If Booking can't get all the money from your Revolut account, they will try to collect some other way. This can take all different forms and shapes depending on the amount and your local legislation so it's hard to predict how this would look like. They may give up quickly, they may take formal legal action which could result in substantial fees, cost, effort and trouble for you.
Frankly, the right thing to do is to pay, either through the Revolut account or some other means. You entered a contract and as much as you expect your contract partners to keep their obligations, the same is expected from you.
I understand that this is an expensive and unfortunate mistake, but in the end it's your mistake, not theirs.
Paying will also make this go away with the least amount of effort and with no blemishes on your records.