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Undo a check-in

If you’ve marked a check-in and need to undo it (by mistake, because it was the wrong guest, because they switched rooms, etc.), you can do it within the same arrival day without asking for help:
1

Open the reservation

Find the reservation with the check-in you want to undo.
2

Reservation tab → Guests

Inside the reservation detail, go to the Reservation tab, then to the Guests section.
3

Three-dots menu on the guest count → Unmark arrival

On the guest count, click the three dots icon and pick Unmark arrival. The reservation goes back to Incoming status and the guests’ details are kept.
Guest count three-dots menu on the Guests tab; Unmark arrival shows up here when the reservation is in house on the arrival day
You can also do it from the Reservations list: in the reservation’s three-dots menu, pick Unmark check-in.
Unmark arrival only appears on the arrival day itself and while the reservation is Inhouse. If you don’t see the option under those conditions, contact support.

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Undo a check-out

Undoing a check-out can’t be done from the Roomdoo app. Once a check-out is marked, the reservation moves to “Completed” and definitively frees the room. If you need to undo it (for example, because the guest stayed one more night and the departure was marked by mistake), you have to contact support.
You don’t need to undo the check-out to invoice: a Completed reservation is invoiced normally from the folio’s Invoice tab.

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When undoing a check-out is needed

If they were leaving today but are now staying another night, the check-out needs to be reverted and the dates adjusted. Contact support with the booking reference.
Happens when a guest had two rooms and check-out was marked on the wrong one. Contact support with the booking references of both rooms.

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When to contact support

  • Undoing a check-out — always, no exceptions.
  • Undoing a check-in outside the arrival day — also contact support.
When you contact support, include:
  • Booking reference
  • Whether it’s check-in or check-out
  • Why you need to undo (so we understand the flow and leave the folio in the right state)
Don’t create a new reservation as a workaround to “skip” the undo. Invoices and payments are linked to the original reservation — duplicating it scatters references that are hard to bring back together later.