A Washington D.C. single-member LLC operating agreement is a document used by a sole business owner to establish operating procedures, policies, as well as protections for the owner’s private assets and accounts. Although not required in Washington D.C., implementing an operating agreement can help limit the owner’s exposure to any company liabilities, such as legal claims or bankruptcy. It can also bring more credibility to the company when applying for a loan or recruiting investors. The document should be timestamped or acknowledged by a notary public to prove its validity.