Is a private housing scheme safe to invest ?

My question is that is a private housing scheme which is a private limited company registered under companies ordinance 1984 and also approved by a govt authority like mda in multan is a safe project to invest your saving? I am specially concerned about “royal orchards, multan” which is a project of well know builders and developers know as “habib rafiq group”. My question is that they only issue transfer letter on possession and do not give a registered sales deed or ownership of a plot.Who is real owner of a plot. Company or a purchaser? Is a transfer letter a legal document showing the title ship in your name? Please inform me. Thanks