There are various documents that these experts verify during the verification process. Some of the most common documents include:-Agreement to Sell.-Conveyance Deed.-Power of Attorney.-Will .-Relinquishment Deed.-Partition Deed.-Mutation Details. Technical documents like Approved Building Plan / Building plan sanctioned by the Statutory Authority, Approved plan of construction / extension & license for construction, Detailed cost estimate/valuation report from Chartered Engineer/Architect, Sanctioned Layout Approval plan Khata Certificate(For bangalore), Extracts, Commencement & Occupancy Certificates. Tax Paid Receipts, NOC from Society/Association, No-due certificate from the building associationGovernment approvals like RTC Extracts, Mutations, Joint Development Agreements, Approvals from Electricity, Pollution Control Board, Water Works & Airport Authority, Agreements between Builder & 1st Owner