Originally Posted by
eponymous_coward
I think SQ supports FQTV and FQTS (two programs in the record), so maybe it’s not particularly risky?
SQ does, but support for it is limited even across *A carriers. Most airline staff I've talked to aren't even aware it's a thing anymore. I suspect it's mainly used for tracking PPS spend nowadays. I'd be amazed if the system even accepts entering a MileagePlan number into the FQTS field.
Originally Posted by
futuramadramallama
Interesting... is it possible to specify at some point, a different number for each of these (whatever benefits each conveys)?
You can call to have the numbers added in. Under ordinary *A rules, you could theoretically call SQ and have them put a Krisflyer number into FQTS (e.g. if you'd previously earned Gold via their transfer bonus) and then credit the spend towards say, UA or AC by entering that in the FQTV field.
FQTV -- the program you wish to credit miles toward
FQTS -- the program indicating your level of status