Originally Posted by DeltaFlyingProf

I am not sure if it is possible to put FQTS as UA with FQTV as AS. You could give it a try. But, as pWei says, I think showing your status membership card should do the trick. Unless (and funnily, that's what AS does) the lounge-operating airline requires that the *G program be on the flight record. Then, maybe if SQ allows to put UA as FQTS, it would help. It's uncertain though. My BPs had printed: "AS KFEG #########" where the #s are for my AS number. I presume KFEG stands for KrissFlyer Elite Gold?

SQ is rather unique in allowing to get PPS status even when earning the RDM on another airline. PPS is *G. To my knowledge, it is however not possible to get SQ Gold status when getting the RDM on another airline.
SQ PPS is spending based, while SQ EG is mileage based.