An Oklahoma single-member LLC operating agreement is used by the sole owner of a limited liability company to determine their rights, responsibilities, and liabilities with respect to the business. Although not required by the state of Oklahoma, an operating agreement can be extremely helpful in protecting the owner’s personal assets and gaining credibility from potential investors and financial institutions. Without an operating agreement in place, the company and the owner would be subject to general state laws governing LLC operations. It is recommended that the document is signed and dated in the presence of a notary public to prove its legitimacy.