Power of Attorney and Declaration of Representative (Form PAR 101). Completing the POA form involves several key steps.First, identify the principal and agent(s). Learn how to create a Power of Attorney in Virginia. A special power of attorney letter grants another person the authority to act on your behalf, so it's essential to ensure that it's properly drafted. What is a limited power of attorney? A limited power of attorney gives the agent authority to do only certain specific things spelled out in the document. How to fill out the Durable Special Power of Attorney Form - Virginia? A power of attorney in Virginia is a legal document giving someone authority to act on your behalf. A POA can be for medical, financial or other matters.