If you dream that you are disinherited, then such dream indicates the necessity to make some changes in your life and check the true values of the life. Perhaps the dream shows that you are not leading the life you thought you do.
Dream dictionary: Disinherited dream meanings
…Dreaming that you are disinherited, warns you to look well to your business and social standing. For a young man Dreaming of losing his inheritance by disobedience, warns him that he will find favor in the eyes of his parents by contracting a suitable marriage. For a woman, this dream is a warning to be careful of her conduct, lest she meet with unfavorable fortune….
Dreaming of being disinherited, but in real life there is no likelihood of receiving inheritance, indicates that the dreamers own affairs, business, employment, etc., are bad due to carelessness, reason why there is a risk of suffering losses and other kind of problems. This dream on a young single person implies that one should not think of marriage for convenience, and in a young single female, it suggests that her behavior is not correct, which will make her prestige be tainted, and if she has any potential lover, she will simply lose him.