In Disney’s movie Coco (2017), Miguel is cursed for stealing from the dead, which is the reason he ends up in the land of the dead, as it is explained by a clerk:
CLERK Well, you're cursed. The family gasps. MIGUEL What?! The clerk searches through a huge stack of papers. CLERK Día de los Muertos is a night to GIVE to the dead. You STOLE from the dead. MIGUEL But I wasn't stealing the guitar!
And he proceeds to explain how breaking the curse would be easy because it is a family matter:
Mamá Imelda turns to the clerk, fire in her eyes. MAMÁ IMELDA How do we send him back?! CLERK Well, since it's a family matter... (flipping pages) The way to undo a family curse is to get your family's blessing. MIGUEL That's it? CLERK Get your family's blessing, and everything SHOULD go back to normal. But you gotta do it by sunrise!
...but it isn’t truly a family matter: Miguel didn’t steal from his own family, he stole from Ernesto De la Cruz who isn’t really related to him. So how is it possible for Mamá Imelda to send him back? How is the curse a family thing?