RERA, title verification: My big questions

Landlord ne phir rent badha diya, ab bas! Finally taking the plunge, looking at properties in Mohali and New Chandigarh for investment. My main concern is legal due diligence. Builder ka track record kaise verify karte hain? Especially projects like Saini Bhawan. RERA registration aur title verification ke liye kya specific steps follow karne chahiye? Koi common red flags jo log miss kar dete hain? Yaar, investment hai toh risk nahi lena chahta. Exit strategy ke liye clear title bahut zaroori hai. Please share your experiences.