A more thorough explanation:

An accumulative legacy is a type of gift given by a person in their will, usually of personal property or money. It is a legacy that has not yet been paid to the person who is supposed to receive it, also known as a accumulated legacy. An additional legacy is a second gift given to the same person in the same will or codicil, which is supplementary to the first gift and not a repeated expression of the same gift.

• John's will states that he wants to leave $10,000 to his daughter, Sarah, and an additional $5,000 to her if she graduates from college. The $5,000 is an accumulative legacy or an additional legacy.
• Another example of an accumulative legacy is when a person leaves a certain amount of money to a charity, but only if the charity meets a certain goal or condition.

These examples illustrate how an accumulative legacy is a gift that is not immediately given to the recipient, but rather is dependent on certain conditions being met or on the availability of funds.