Originally Posted by Adam Smith

It's possible that it was flagged by the dupe detector and you weren't notified. I've never been notified of any booking it has cancelled - one fairly definitive observation I've made is that it never notifies if either booking involves a flight pass credit. Not applicable in your case, but I've had other situations where I know it has been flagged but I've not been notified.

Unfortunately there's no self-serve way to tell whether something has been flagged. It does apparently flag the file or put notes on it or something, so AC agents can tell if they look at the booking that something has been flagged. It's possible that's how the Concierge knew about yours.

Originally Posted by billdokes

Neither were cancelled by the system, I ended up cancelling both of them (without any cost or penalty as a SE) as I didn't end up going to YEG as planned prior. Not really sure how they can justify cancelling flexible bookings that conflict when they could be legitimate and by some of their most valuable clients...ie: a SEMM Management Consultant that needs to travel but isn't sure if they can make the 2 pm or the 4pm, or the SE2MM IT Consultant who isn't sure if they need to be in EWR or YYZ on a given day....I'm sure we could come up with many more examples.

Isn't that the whole point of flexible bookings? They cost a TON because they are flexible and can be refunded?

Originally Posted by expert7700

I have a hard enough time not getting my and my son's bookings cancelled as duplicate. ZERO caracters in our first or middle name match, we have completely different birthdates, and different Aeroplan elite numbers.
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Originally Posted by Adam Smith

The short answer is likely yes, although maybe not. They don't even have to be on the same flight to get flagged, they just need to conflict, in the duplicate booking detector's judgment. So you might book a totally legal YYC-YVR-YCD-YYZ-YYC trip across 2-3 itineraries with legal connections at each point, and have it be flagged by the dupe detector and possibly cancelled. Or you might have a YYC-YVR, YYC-YUL, and YYC-YOW all departing at the same time and have none of them flagged.

Originally Posted by tdot_guy

Does anyone know what happens if I have two tickets for the same date but from completely different cities? so for example one,
from Singapore to Toronto and then another one from Paris to Toronto.

I ask because I�m looking at bookings one year from now and I�m not 100% sure where I�m going, but Both cities are showing great prices so I want to lock them in now and decide later

Originally Posted by Adam Smith

​​​​​​Bookings don't get cancelled instantly. Based on my extensive research, there is some sort of time period to remedy the duplicate bookings, which appears to be correlated to the length of time until the flights. For instance, a flight 6 months out might give you a week or two to resolve the duplicates. A flight a week out might give you a couple of days. A flight 3 days out might give you a day. (I don't know the exact thresholds, just trying to illustrate the concept).

I understand from talking to res agents/concierges that when Amadeus detects a duplicate booking, it adds a note to the PNR. Something like "Duplicate booking with [PNR ABC123]. Remedy by 3PM Montreal time October 2, 2023 or system will automatically cancel". If you want to increase your confidence level, you could phone in and ask them to check the file for any notes like that.

The note will be added to all bookings deemed to be duplicates, although it will not say which booking will be cancelled. The dupe detector also doesn't always pick these things up right away - 12 hours after booking, there might be no note, and two days later, it might be cancelled. So I don't know whether the dupe detector only runs every 24 hours or something like that.

But, as always, it's worth noting this function is inconsistent. It might flag YYC-YUL-YYC round trips on back-to-back days (perfectly feasible to fly and not in violation of any tariff rule) and then not even notice blatantly conflicting YYC-YUL, YYC-YOW, and YYC-YVR flights on a different date.



The dupe detector is indifferent to method of booking - cash, points, flight pass credit, it doesn't matter.

Originally Posted by jfdes

I am currently in Germany and trying to book a T-72 hrs flight, I'm flexible so can go over the next few days. I have a refundable award flight already booked for Sept. 27. If I find an LH F flight for Sept 27, will I be able to confirm it, then quickly cancel the old ticket, and I should be safe? Like you said, it shouldn't immediately cancel a duplicate so I should be safe if I'm quick, right (like within minutes)?

Originally Posted by Antonio8069

I managed to make duplicate reservations and the system only cancelled one of them. Happy to take a credit - but - the agent says I have to pay a $150 change fee. I am looking for suggestions on what to do next? Chargeback?

Originally Posted by traveller12345

I made a duplicate booking on day X and day X+1, both of which include flights on AC and a partner airline.
There was a schedule change from the partner airline, but when I went to see my bookings, neither of them could be retrieved.
On AC website, it says both bookings are "not found". On the partner airline website/app, it says both bookings "have been cancelled".

I called Aeroplan, and the agent insisted that both bookings are live - she said both she and the ticketing department can see they are there.
When I mentioned that the partner airline shows "cancelled", she said she can't speak for the partner airline and advised me to contact the partner airline.

I called the partner airline, and the person said he also sees both bookings are live, but told me to call AC (since it's an Aeroplan ticket) to cancel duplicate booking.

1) Is any action required? How can I make sure the tickets are not cancelled? I cannot see them online.

2) If I must cancel duplicate booking to resolve this issue, can I wait until closer to day X so I know which one I'd like to take?

Originally Posted by Jutr78

Originally Posted by Jutr78