If all other data is correct, the passenger's passport number (birth certificate, ID card, etc.) can be fully changed in most airline tickets. 

✔ For tickets with foreign carriers (Turkish Airlines, Air Astana, and many others), in most cases, this data can be corrected free of charge — provided there are no errors in the passenger's full name. Submit a request on the order page — and we will help you with the correction. Please attach a scan or photo of the passport spread to your request.

✔ Sometimes it is more profitable to cancel the ticket on the day of booking (if this option is available) than to correct the passport number or date of birth in it. 

If you notice an error on the day of ticket purchase, write to our online chat from your Personal Account so that we can check the possibility of correcting and canceling the ticket for you and advise on the most cost-effective option.