https://www.siliconvalley.com/2024/04/22/travel-troubleshooter-i-accidentally-paid-twice-for-my-hotel-can-i-get-a-refund/

DEAR TRAVEL TROUBLESHOOTER: I recently reserved and paid for a room at the Marriott Vacation Club Pulse at Custom House, Boston, through Booking.com. I prepaid $1,191 for my accommodations.

I received a confirmation that I had booked a room at the property and that I had paid for it. However, when we checked out, my husband paid for the room again — not realizing that I had already paid for the hotel through Booking.com. We received an email invoice from the hotel and left the Marriott property, not realizing we had paid for our stay twice.