- Enter the unique identifier assigned to a business by the Ohio Secretary of State. This identifier can be comprised of alpha and numeric characters, or only numeric characters. This is a 'Charter Number' for Domestic Corporations. It is a 'Registration Number' for Foreign corporations, Limited Partnerships, Limited Liability Companies, Business Trusts, Real Estate Trusts, Limited Liability Partnerships, Trade Names, Trade Marks, Service Marks, Fictitious Names, Marks of Ownership and Registered Foreign Names. It is a 'Filing Number' for Name Reservations.