Existing thread on this:
Malaysia Airlines Official Policy on Checking bags on separate tickets
Originally Posted by
carrotjuice
The wording on their check-in info page is a tad different though. It seems to suggest that separate tickets on "codeshare partners" are acceptable, which would include SQ.
https://www.malaysiaairlines.com/hq/...unter-check-in
I would still ask at check-in, even for non-OW. Functionally, there's no difference as long as an interline agreement exists, so it really comes down to the agent's helpfulness/interpretation of the rules.