FYC, find out if the title is out. If it is, engage a lawyer to conduct a title search. This will show who the owner is. This will cost RM30.

If the title is not out, write to the Developer to confirm. You will have to pay them RM50 for their confirmation.

Alternatively, you could ask the owner for a CTC of the title or the Sale and Purchase Agreement, but of course the search/confirmation is much better protection for you.