Anyone know the origin of this code: D467000 ? I see it posted on a lot of deal sites and wondering if it's safe to use. In my reservation email they included this notice: "This reservation was made using a corporate BCD (Budget Customer Discount Code) that requires validation of eligibility. Please be prepared to produce your company ID, business card, or a recent email with the company’s email domain for employment verification purposes when picking up your vehicle."

The code is saving me over $200 compared to Costco or my Union Plus discount.