DiAna Law Group can assist you with a power of attorney when you need help managing finances, paying bills and help making decisions. At the Law Offices of Gary R. Kershner, I can help you create an effective and legally sound power of attorney.Reach out to schedule a free consultation. The process of using a Power of Attorney in a real estate transaction begins with drafting the POA document. In California, the four primary powers of attorney include General, Durable, Limited, and Medical. When you give someone a "Power of Attorney" (POA) you are giving them "agency authority:" the power to act in your name.