This document discusses the customer life cycle in real estate and the documents involved in handling customers. It describes the nine steps in the customer life cycle from initial site visit to society formation. These include filling forms, follow ups, booking, loan processing, registration, demand letters, account files, possession, and society formation. It then lists and provides examples of key documents like the enquiry form, booking form, customer account file, sanction letter, builder NOC, demand letter, and architect certificate. Maintaining these documents at each step is important for properly managing customers.