Hi All,

I have an upcoming flight as follows:

SIN-ZRH: SQ (M)
ZRH-GVA: LX (V)

then

GVA-ZRH: LX (V)
ZRH-SIN: SQ (M)

I want to credit the SIN-ZRH-SIN to my SQ account and the ZRH-GVA-ZRH on my LX account (mainly because I'm missing a couple of thousand miles on M&M in order to claim for an award ticket and close that M&M account).
Moreover, the domestic flight on LX gives me more miles on LX (500 each way) than on SQ (100% miles flown, which would be far less than the 500 each way).

What's the best way to do this? Remove all FF# from this reservation and present the respective cards at check-in? But then I'd lose visibility of my reservation on SQ.com, correct? Or can I ask my company TA to do all this for me without risking to "screwing" it up?

I know that once, the miles have been credited to company X, it's quite a long way to cancel it and re-credit to company Y. So I wanted to know what's the safest way to ensure all goes as planned?

Thanks!