Answer:
kickback
Step-by-step explanation:
In business, kickbacks are illegal because they are a form of bribery. A kickback happens when an illegal sales commission is paid to an individual that works for another company but is responsible for placing an order. Kickbacks include other things besides money, such as trips, gifts, etc.
Kickbacks are illegal because the person that receives the commission (Jeff) is not making unbiased purchase decisions.