Ohio Rev. Code § 5804.01: Methods of creation of trusts.

A trust may be created by any of the following methods:

(A) Transfer of property to another person as trustee during the settlor's lifetime or by will or other disposition taking effect upon the settlor's death;

(B) Declaration by the owner of property that the owner holds identifiable property as trustee;

(C) Exercise of a power of appointment in favor of a trustee;

(D) A court order.