Can someone misappropriate assets unintentionally?

This often occurs when the person who has taken assets does so on the mistaken belief that they were promised them by the deceased before their death. Or on the basis that it has been agreed with other family members previously that they should have that particular item even if it was left to someone else in the will. Alternatively, a person may feel that they deserve those assets for the help and assistance that they gave during the deceased’s lifetime.