Ohio Rev. Code § 4735.21
No right of action shall accrue to any person, partnership, association, or corporation for the collection of compensation for the performance of the acts mentioned in section 4735.01 of the Revised Code, without alleging and proving that such person, partnership, association, or corporation was licensed as a real estate broker or foreign real estate dealer. Nothing contained in this section shall prevent a right of action from accruing after the expiration of a real estate or foreign real estate license if the act giving rise to the cause of action was performed by a licensee prior to such expiration.
No real estate salesperson or foreign real estate salesperson shall collect any money in connection with any real estate or foreign real estate brokerage transaction, whether as a commission, deposit, payment, rental, or otherwise, except in the name of and with the consent of the licensed real estate broker or licensed foreign real estate dealer under whom the salesperson is licensed at the time the sales person earned the commission. Nor shall any real estate salesperson or foreign real estate salesperson commence or maintain any action for a commission or other compensation in connection with a real estate or foreign real estate brokerage transaction, against any person except a person licensed as a real estate broker or foreign real estate dealer under whom the salesperson is licensed as a salesperson at the time the cause of action arose.
A salesperson licensed under this chapter shall not sell, assign, or otherwise transfer the salesperson's interest in a commission or any portion thereof to an unlicensed person or entity. If a salesperson makes such assignment or transfer, the broker shall not pay the transferee or assignee any portion of the commission. No cause of action shall arise on behalf of any person against a broker for not paying an assignee or transferee any portion of such an assignment or transfer.
R.C. § 4735.21