Used when someone gets a duty because another person can't or won't do it anymore.

Shifting Responsibility

Commonly found in legal, business or formal texts, rather than casual conversation.

Often Formal

Can imply taking on a responsibility unwillingly or by default.

Often used when talking about what happens to someone's things after they die.

Indicates a process that happens by law or rule, not needing any extra action.

Used in contexts where someone takes over a position as a successor.