Legal termination of a contract. Forgives non-performance . Except where contract terms override this implied legal provision, it automatically discharges the contract. It is not acceptable as an reason against foreseeable circumstances . It is not applicable contracts like insurance policies. It does occur due to unforeseen circumstances that (1) prevent achieving objectives, (2) cause illegal actions , or (3) render execution impossible. An accident, a change in law, a fire, a sickness, or third-party interference are examples of causes.