Hotels occasionally sell more rooms than they can deliver, and the resulting practice of moving a guest to another property has its own conventions. Knowing them changes the outcome considerably.
Overselling has the same logic as it does in aviation
A proportion of reservations never arrive, and a room left empty overnight generates nothing. Hotels therefore accept bookings slightly beyond capacity on nights when history supports it.
The forecast usually holds, but a late checkout, a maintenance failure or an unexpectedly low no-show rate can leave the property genuinely short.
Rooms out of service for repair are a frequent trigger, since a burst pipe or a failed air conditioning unit removes inventory that was already sold.
Selection is not random
Hotels generally relocate the guests whose stay is easiest to move, which tends to mean one-night bookings, guests arriving latest, and reservations made through third parties at low rates.
Long stays are rarely moved, partly because relocating them is complicated and partly because the guest would have to be moved back.
Loyalty programme members and guests who booked directly are usually protected, which is one of the more concrete benefits of booking with the property itself.
What the receiving property arrangement involves
The convention is that the original hotel arranges a room of at least equal standard nearby, pays for the first night, and covers transport between the two.
Where the stay continues beyond that night, the guest is normally brought back to the original property the following day, with the room held.
Incidental costs caused by the move, such as a meal or a phone call home, are frequently covered as well when raised at the time rather than afterwards.
Obligations are mostly contractual, not statutory
In most places there is no specific law requiring a hotel to relocate a guest, and the practice rests on the contract formed at booking and on industry convention.
Consumer protection rules may apply to the failure to provide a booked service, and what they require differs substantially between jurisdictions.
Because of that variation, a guest affected by a relocation should establish what is being offered in writing at the time rather than relying on an assumed standard.
How to reduce the chance of being moved
Arriving early in the evening rather than late helps, since relocation decisions are typically made as the desk works through the remaining arrivals.
Confirming the booking directly with the property a day or two ahead reinforces that the reservation is live and reduces the chance of it being treated as expendable.
Where a specific room or view is the point of the trip, saying so at the time of booking is worth doing, because a guest with a noted requirement is a harder guest to move quietly.