There are two main steps to create a ‘Power of attorney’ that can be used for property registration in India:
1. Attestation of Power of attorney by Indian Embassy
Applicable only if you are outside India.
Check this link for a sample ‘Special power of attorney’ that can be drawn for property management in India and then get it attested by the Indian Embassy.
2. Registration of Power of attorney - To be done in India
Complete step by step process and required documents mentioned here: