Disounts for associates
In the fine print of these discounted rates for associates is the warning that misuse constitutes fraud and that the associate is liable for both the use of the discount and the behavior of the person using the discount (assuming that they are not the associate). I would hesitate to use anything that is not rightly yours--especially when the use of this form violates specific terms and conditions of Marriott employment and can result in disciplinary action up to termination for the employee.
As I understand it these are audited heavily by corporate and patterns are quickly noted. Best advice, pay rack rate and save the hassle and consequences!^