I had Hertz ping me on ID when I went on a client trip. Naturally, as a consultant I couldn't provide the client ID (I do have one client who gives me ID, but not this one). Ironicly, it was the client's travel agency that made the reservations. Ultimately, Hertz matched the rate, but didn't provide the "negotiated benefits" (e.g. automatic insurance waivers). Fortunately, my CC had the coverage, otherwise it would have significantly increased the cost.