Cannot add QF Frequent Flyer Number on Cathay's website

[LionKing]

I have made a recent booking on Cathay and I was unable to add my frequent flyer membership on Cathay's website other than asking me to sign up for Cathay's membership which I don't want to do:



Does anyone know how I could have been able to do otherwise to ensure my Qantas FF is added?
Adding my QF FF number is crucial because that would allow me to select seats for free since I am Qantas Platinum.

Thank you!

 

[pjm99au]

Strange. When booking after selecting your flight it brings up the passenger information page. Select continue as guest from the pop up box and you then select the QFF program. If you have booked I suspect you will need to call them to get your QFF details added

 

[kamchatsky]

Are you trying to add the QF number when you were at booking stage? or you want to add it (or change from a CX number) after it is ticketed?

It could be an anti-fraud measure:

https://www.flyertalk.com/forum/cathay-pacific-cathay/2205881-can-no-longe-enter-non-cx-freq-flyer-number.html

 

[SYD]

I’ve had two CX trips this year. No issue adding QFF details at time of booking. As above, if it’s already ticketed, you’ll probably have to call CX.

Most of the old hacks of going to rj.com or other OW websites generally don’t work anymore.