I have been invited by several large corporations that I have been visiting as a vendor to use their corporate rates at various Marriotts.

If I were ever treated with the embarassment of somebody trying to "verify" my eligibility for this rate with my client, I would take my business eslewhere.

Would Marriott losing my 75+ nights of business per year be worth it for the extra $100 they think that they coud charge me if they tried to deny me using my clients' corporate rates (at their invitation?)