Originally Posted by
smallben
I encountered a very similar scenario yesterday.
I didn't enter any FFP when purchasing a set of CX return tickets. The check-in counter in HKG inserted my CX FFP for lounge access and I removed the FFP at the bridge's counter afterwards.
Since I have removed my CX FFP for the rest of the journey, the boarding pass, supposingly, should be clean. However there was a mysterious FFP printed on my returning journey's bp, starting with AY. I am pretty sure I have not join any programme from AY. I asked the staff to remove that FFP which came out of no where and re-print the bp for me.
Sitrep: Upon the completion of my journey, I visited CX's page of 'Manage booking' again to check this morning and discovered the mysterious AY FFP was linked to my journey again. I called CX's CS and they tracked the FFP was alterated manually by staff an hour after my departure.
I called AY and confirm that the falsifying Finnair Plus account is registered using my name.
So for the record and those who are interested - you may still change your FFP one hour after the flight has departed given an insider is eager to help.
I departed from a Europe port btw.