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. Creating a Power of Attorney for real estate transactions within New York City is a multistep process to ensure legality and transparency. This indispensable form contains everything you need to make a valid power of attorney for real estate in the Empire State. Select Power of Attorney under the Services menu. Select File a power of attorney from the drop-down menu. Free Power of Attorney. Answer a few simple questions. For example, an attorneyinfact might be given the power to sign documents, manage a bank account, or sell property on behalf of the principal.