I was asked for the credit card that I used to book last year, in Phuket, By Etihad, the credit card had been cancelled a long time ago, in the end I was able to find online a copy of my credit card statement showing the credit card number with my name. It took a long time to get approval for this as they had to wait for approval from Abu Dhabi to allow me to check-in. It was a J ticket that was purchased. This was the first time in many years I was asked for this and I have not been asked since.