Hotels must produce proof of structural changes including the installation of new guest rooms or bathrooms, alterations to hotel layout, or complete property overhauls. Cosmetic changes like new paint or curtains do not count. According to TripAdvisor’s Help Center, hotels need to provide building permits, materials invoices, or press releases to prove that the renovations were indeed structural and completed. All old reviews are then deleted from the live site and cannot be accessed by travelers or hoteliers. Any removed reviews are no longer factored into the hotel’s Popularity Index. Get the full story at Skift