By their very nature, guaranteed reservations (including advance deposit reservations) have no time limit on them. Guaranteed reservation guests arriving as late as 2am (or even later) should still expect to find their room. After all, that is one of the key reasons for guaranteeing the reservation.

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Guaranteed reservations ensure that the hotel holds the room for the guest regardless of their arrival time, as the guest has either prepaid or guaranteed payment, providing assurance to the hotel of compensation.

By Their Very Nature, Guaranteed Reservations (Including Advance Deposit Reservations)