What nobody tells you about RERA checks in Sohna

Honestly, I had no idea RERA checks are so tricky. I'm eyeing a 3BHK in Sohna, maybe near Golf Course Ext. Road. Builder ka RERA registration number verify kaise karte hain, and what are the actual red flags to look for? Also, title verification mein kya kya dekhein? Bahut confusion hai, koi help kar sakta hai?