obligation

A personal relation in which one is indebted for a service or favor.

A written promise to repay a debt.

The social force that binds you to the courses of action demanded by that force.

“every right implies a responsibility; every opportunity, an obligation; every possession, a duty”

A legal agreement specifying a payment or action and the penalty for failure to comply.

The state of being obligated to do or pay something.

“he is under an obligation to finish the job”