When you're about to get on a plane, the last thing you may want to see on your boarding pass is what looks like a message of "death".
All airlines in the world issue a booking reference when a ticket is purchased, and different airlines use different formats.
Air New Zealand uses a system that randomly generates a six character code for every booking you make - it's the one you use when you log on to make changes to your booking and has all of your information attached to it in the airline's database.
When dealing with just six characters, there will be times when an unfortunate combination is generated - which was the case for two people who posted their booking references on Reddit
A user called Blindside posted a screenshot of his booking reference 'DEA7HH' with the heading 'Is Air New Zealand trying to tell me something?'.
In response, another traveller under the name tlnz posted a screenshot of his booking, which was far more unfortunate as '4SKINH'.
Newshub Travel has asked Air NZ if there are any codes that are blocked from being issued, the airline is yet to respond.
Have you ever had a similar unfortunate booking reference? Let us know via the Newshub Travel Facebook group.