This discussion explores the legalities of purchasing a 50% undivided share in a commercial property in Karnataka under tenancy in common. Key questions revolve around the validity of registering a sale deed for a partial share, inclusion on the Encumbrance Certificate, and potential limitations of the Kaveri online portal for co-ownership. The advice highlights that while selling an undivided share is permissible, possession rights are only secured after a formal partition. It's recommended to consult a local lawyer for specific guidance on partition agreements and legal procedures.