Yes, you can depose a corporation. While Illinois courts have said little about obtaining deposition testimony from representatives of a corporation, several federal decisions are instructive. Corporations can designate a person to speak as the corporation — and not only regarding facts. Federal Rule of Civil Procedure 30(b) also extends testifying to subjective beliefs and opinions.
Corporate designees may be held to a high standard when speaking on behalf of a corporation. Answers such as “I don’t know” may not only bind the corporation to the deponent’s ignorance but may also result in sanctions for failing to produce a witness with responsive knowledge. This places a burden on corporations to ensure individuals speaking on their behalf are adequately prepared.