In Disney’s movie Coco (2017), when Chicharrón disappears, Héctor explains the "rules" about the Final Death, and how in order not to be forgotten and disappear, your stories must be passed by people that knew you in life, and kept from generation to generation:
Héctor picks up his shot glass, lifts it in honor, and drinks. He places it rim down next to Chicharrón's glass, which is still full. MIGUEL Wait... what happened? HÉCTOR He's been forgotten. (beat) When there's no one left in the living world who remembers you, you disappear from this world. We call it the "Final Death." MIGUEL Where did he go? HÉCTOR No one knows. Miguel has a thought. MIGUEL But I've met him... I could remember him, when I go back... HÉCTOR No, it doesn't work like that, chamaco. Our memories... they have to be passed down by those who knew us in life -- in the stories they tell about us. But there's no one left alive to pass down Cheech's stories...
Héctor is disappearing because the last person that knew him alive (his daughter) is forgetting him, but truly his (bad) story was passed from the people that knew him in life: he was an awful man that abandoned his family to pursue his dream of being a musician, and never came back home.
That's the story that is used by Abuelita, Miguel's parents, and Miguel himself to justify the family's hate for music and how Mamá Imelda started the shoe shop. And that story had to be passed by Mamá Imelda (Coco wouldn't have told it to Abuelita, as she cherished him).
So, why is Héctor disappearing if his story is still been told?