To create a valid POA in Ohio, the principal must be of sound mind and over the age of 18. This power of attorney authorizes another person (your agent) to make decisions concerning your property for you (the principal).Although filing a POA with a local county recorder is not necessary in Ohio State law, parties are usually advised to do so to support the document's validity. Ohio has specific legal requirements for a valid POA form. The principal must sign the form with a notary or two witnesses. An Ohio real estate power of attorney form is a document used to appoint an agent to represent matters related to your real estate interests. A POA grants legal authority to another person to act on behalf of the principal. An Ohio real estate power of attorney allows a person to act on behalf of another individual in matters involving real property. Typically, a POA is used when an individual becomes unable to handle his or her own affairs. The POA is notarized.