我觉得要不在那个cashier当班的时候送回去吧。最好是没人时还给他,与人为善,也 趁机培养一下这个cashier。^^ The earlier the better. But if this CVS store is too far away, it's not a big deal that you don't send it back.
for most states, agent rebate or kickback is illegal. the legal way is called buyer's credit or commission refund at closing. btw, I remember that you want change your agent since your agent lost his/her patient after months of looking. is this the same one you want to fire?