There has been a call for more airlines to introduce the 24-hour rule, allowing customers to correct mistakes made when booking without charge - something that may be handy for those organising large stag parties.
According to Which? Holiday, carriers would benefit from allowing consumers to rectify any discrepancies made while booking.
Spokeswoman Rochelle Turner said there should be a guarantee of some kind that allows passengers to amend their details for a short time after paying.
"It would be interesting to know how much money they are earning from the mistakes that consumers make and if that is the reason why they are not taking a more proactive stance in helping people who are making innocent mistakes," she added.
The comments come after a report from the Air Transport Users Council suggested carriers amend their policies on the matter to help out their customers.
It revealed it receives numerous complaints from customers left out of pocket after trying to correct mistakes caused by glitches in reservation systems.