as stated above.. citizens have a right of entry into their own
country..
which means if a Singapore citizen appears and can prove that he is
one (using an IC) we allow entry into Singapore even without a
passport..
however, your mom is a PR.. PRs do not have a right of entry into
Singapore... PRs NEED a passport before we allow entry...
if the same goes for Malaysia, at their checkpoint, they may allow
her to enter Malaysia with her MyKad... that is the right of
Malaysians if it is the same over there... however, i don't know
about what goes on in Malaysian Immigration at their
checkpoint..
when she wants to come back to Singapore, she WILL need her
passport..
since she has no passport at the moment, she'll be stuck in
Malaysia... will have to stay somewhere in Malaysia until she gets
another passport...
i'm going off.. hope you guys make the correct decision