How can buyers verify the authenticity of a Power of Attorney (GPA) before buying land?

Verify that: 1. The GPA is registered at the Sub-Registrar Office; 2. The principal is alive on the date of execution; 3. The GPA specifically authorizes the sale of the exact plot; 4. Obtain confirmation directly from the original owner to prevent forged power of attorney scams (Suraj Lamp ruling).