A Pennsylvania single-member LLC operating agreement is an internal document that establishes the internal policies and procedures of a limited liability company owned by an individual. The document also solidifies the company’s standing as a separate entity from the owner, protecting the owner’s personal assets in the event of company bankruptcy or litigation. Although an operating agreement is not required in Pennsylvania, some financial institutions may require a copy when the company applies for a loan. Potential investors may also want to review the document in order to vet the company’s structure and viability. Because a single-member LLC operating agreement only has one signatory, it should be authorized in the presence of a notary public.