Yes, a property owner or host can cancel a Booking.com reservation, but they are typically subject to strict platform penalties and "relocation" obligations. Unlike a guest, an owner cannot simply cancel for any reason without consequence. If a host cancels due to an overbooking or an error on their end, Booking.com often requires the host to find the guest comparable alternative accommodation and pay for any difference in price. If the host fails to do this, the platform may bill them for the relocation costs. There are "valid" reasons for cancellation, such as a guest's credit card being declined or the guest violating house rules, but even then, the host must follow a specific reporting process. For travelers, an owner-initiated cancellation can be incredibly stressful, especially last-minute. If this happens to you, you should contact Booking.com customer service immediately, as they are responsible for assisting you with a re-booking and holding the host accountable for the breach of the reservation agreement.