In many cases, the customer's will is executed by an executor. An executor is a person appointed in a will to handle the execution of a customer's estate after their death. They are responsible for managing the customer's assets, paying their debts, and distributing any remaining property according to the customer's wishes. Executors can be family members, friends, or professionals with legal experience such as attorneys or financial advisors. It is important to note that executors need to be guided by the customer's will, and any actions taken should be in the best interest of the customer's estate.