I earn American Express Membership Reward points at a much higher rate than my wife does. For a long time I have transferred her points into my frequent flyer accounts. This helps us to keep my balances high which is more useful.
I recently transfer 51k MR points from her MR account into my Krisflyer account and successfully booked three tickets.
After about two weeks I received an email from Krisflyer noting that a mismatched transaction took place and to provide the proof that I owned the account. I provided copies of our passports and explained the situation exactly as above. Krisflyer responded that the ticket must be refunded and the 51k miles must be transferred into my wife's Krisflyer account. I asked Krisflyer to hold off, so I could transfer an additional 51k points from my Amex MR account requesting to leave the ticket intact. Krisflyer rejected that approach and went forward with the cancelation and the transfer. Once the flights were canceled, the award inventory reappeared thankfully and I simply rebooked the flights after transferring 51k miles out of my Amex MR account.
Krisflyer is certainly within their rights to do what they did. I did not receive an answer why cross account transfers are allowed by their IT. It should be easy enough to reject these transfers. The whole process was done via email and took approximately took weeks.
I am positing this as a data point in case anyone else has this issue.