Authorize someone to make decisions on your behalf. If you are unable to attend a real estate closing and sign the necessary documents you can have your attorney prepare a power of attorney for you.Complete the necessary forms: There are forms to fill out to designate power of attorney and the terms of the agreement. Select Power of Attorney under the Services menu. Select File a power of attorney from the drop-down menu. Fill out your form and sign it in the presence of a notary. Creating a Power of Attorney for real estate transactions within New York City is a multistep process to ensure legality and transparency. A Power of Attorney (POA) allows one person to appoint another person to act on their behalf. Create your free general or durable POA today. Limited POA: Grants authority for specific tasks, like selling a property or filing taxes.