Legal traps buyers often miss in Chandigarh

Since last year, I've been seriously looking for a 3BHK in New Chandigarh or Mohali, maybe even Zirakpur. I work in real estate, but buying for myself feels totally different. I know the marketing spin, but the legal stuff still makes me uneasy. What's the real deal with RERA registration for projects like Saini Bhawan? I know how to check the portal, but what actual red flags should I look for beyond just 'registered'? Builders can be sneaky. Also, what happens if they delay possession? What are the *real* legal options under RERA? Is it effective, or just a paper tiger? I'm trying to avoid any nasty surprises with title verification too. What critical steps do people often miss? Don't want to find out about an encumbrance after paying. Any insider advice from fellow buyers?