perfectly legal, can be done in 2 ways
point transfer from credit card A to krisflyer B, but nothing stops airlines from closing your account or voiding the miles because it's against the tnc. this is provided that the bank actually approves the transfer.
adding someone to nominee list, and redeeming a ticket from your own krisflyer account. this is allowed to my knowledge.
correct me if i'm wrong
Okay. Seems the 2nd way is more approachable. Applies to Asia Miles too? I don't have KrisFlyer...