Ohio Revised Code Title I. State Government § 147.50

(1) An inspection of a passport, driver's license, government-issued nondriver identification card, or other form of government-issued identification with the signature or photograph of the individual, which is current or expired not more than three years before performance of the notarial act, and is satisfactory to the notary public;

(2) By verification on oath or affirmation of a credible witness personally appearing before the notary public and personally known to the notary public or whom the notary public can identify on the basis of a passport, driver's license, or other government-issued nondriver identification card, which is current or expired not more than three years before performance of the notarial act.  A witness is not credible if the witness has a conflict of interest regarding the transaction.

(1) The person has a direct financial or other interest in the transaction in question.

(2) The person is named, individually or as a grantor, grantee, mortgagor, mortgagee, trustor, trustee, beneficiary, vendor, lessor, or lessee, or as a party in some other capacity to the transaction.