An Oregon single-member LLC operating agreement is a legal document used by the sole owner of a limited liability company to establish policies, procedures, and other internal aspects of the company. The document also helps protect the owner’s personal financial accounts and assets from the company’s liabilities and obligations. Although not required in Oregon, the operating agreement is extremely helpful in bringing credibility to the company, especially in the eyes of potential investors and financial institutions. It is recommended that the document is signed and dated in the presence of a notary public to prove its authenticity.