[sgxin]

News already out...adopted, mother died 2 years ago. She want her dad to transfer HDB flat to her which he refused.

But she is the only daughter. If her dad passes away, she will still get to inherit the HDB lease. Thus why the rush? 
Or is there a law that forbids an adopted child from doing so?
If not, could her intention be to live separately from her dad -- ie to kick him out once the flat goes under her name?