What does each result on the scanner mean?

Each result says it in words as well as colour, so nobody has to rely on the colour alone.

Three groups of scanner results. Green, let them in: Let in, a good ticket, with the name and ticket under it; Saved on this phone, let in with no signal and sent later; Let back in, their return is noted with the time. These clear by themselves after about two seconds. Orange, read the words: Already in at 20:19, this ticket has already been used and someone else may be showing a copy. Only choose Let back in if you are satisfied this is the same person returning; Forms not signed, they sign the event's required forms first. Red, do not let them in: Not valid, with the reason underneath; Not checked, the ticket could not be checked, so scan it again. Orange and red stay until you tap.

Orange and red screens stay until you tap. The camera reads nothing new meanwhile.

On Let in, a little celebration leaves the screen and lands on their ticket. To keep a phone still, turn off Celebrate each check-in under Recent scans on this device.

What if a ticket has already been used?

Already in means this ticket has already been checked in, at the time shown. That warning helps staff stop two people using the same QR code. Someone else may be showing a copy; the code alone cannot tell you whether this is the same person returning.

A single-date pass shows Welcome in. instead of its QR code once it receives the check-in. If the returning person has no code to show, find their ticket by name or reference in manual search. An older screenshot or a phone that has not received the check-in can still show a code; a pass covering more dates may also keep its code for those dates.

Only choose Let back in if you're satisfied this is the same person returning. The screen turns green and shows Back in at, with the time. A confirmed return is noted without counting the ticket twice; the next scan shows earlier recorded returns. With no signal it says No signal: not noted; if the reply is lost it says Return not confirmed. Undo removes a return pressed by mistake.

Two phones. On the left, an orange screen: Already in at 20:19, Kate Doyle, Walk place, #101 · PD3S6D, Let back in once already, at 01:40, a warning that someone else may be showing a copy, and the instruction to choose Let back in only if satisfied this is the same person returning. On the right, the green screen after pressing it: Let back in, Kate Doyle, Back in at 01:41, with Undo.

Why was a ticket turned away?

The line under Not valid gives the reason. These are the usual ones:

Refunded or cancelled: The ticket can't be used for entry any more.
QR is out of date (transferred): It's an old code. The ticket now belongs to someone else.
Pending transfer: A transfer is waiting for the new holder to accept.
Queued refund request: The holder has asked to return it for a refund, and that's still open.
Not valid for the time being scanned: The ticket doesn't cover the date you're scanning.
Invalid QR signature: It isn't a ticket for this event.

A red screen on a phone: Not valid. This ticket was refunded, so it cannot be used for entry. Tap anywhere to scan the next ticket.

How do I undo a check-in I got wrong?

Press Undo check-in on the green screen. It also stays on the strip below, but only for the last person let in on that phone. An Already in screen has no undo. If it then says Undo not confirmed, the phone couldn't reach Hubbaly, so press Undo check-in again.

On an event with several dates, it undoes only the date you're scanning. Once the scanner closes, four hours after the event ends, it can't be undone there.

A green screen on a phone: Let in, Will Turner, @willtwalk, Walk place, #22 · MVETXV, and Undo check-in.

Can I check someone in without scanning?

Yes. The scanner opens on search, ready for a desk. Search by name, @username or ticket ref, then press Check in.

With the box empty, an event under 1,000 tickets lists up to 25 people not yet checked in, under Ready for manual check-in. A ticket already checked in shows In at and the time, with Let back in. Only choose it if you're satisfied this is the same person returning; finding the ticket by name or reference does not prove that.

It runs the same checks as a scan, but it needs signal. Use camera switches to scanning, and Manual check-in switches back.

The scanner on a phone, open on search: Scan tickets with Use camera, the search box, Ready: Search for a ticket, and under Ready for manual check-in, Amir Hassan's Walk place #25 · BWB31G with Check in.

What it cannot do

It can't let in a ticket with unsigned required forms. There's no override at the door.
It can't check in a ticket for a date it doesn't cover.
It can't undo an earlier check-in once someone else has been scanned.
It can't undo a check-in once the scanner has closed.
It can't search for people without signal.
It forgets Recent scans on this device when you leave the session.
It can't treat an Event shop code as a ticket. It says Not an admission ticket, and asks for their entry ticket.

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