In legal studies, the term that fits this definition is a Contingent contract. A contingent contract is a contract to do or not do something, dependent on the occurrence or non-occurrence of an event in the future.
These contracts are enforceable only if the event specified in the contract happens. If the event becomes impossible, the contingent contract is rendered void. It's an agreement whose fulfillment is subject to an uncertain future event.
| Options | Description |
|---|---|
| Contingent contract | Contract dependent on an uncertain future event |
| Quasi contract | Obligation imposed by law to prevent unjust enrichment |
| Breach of contract | Failure to perform any term of a contract without a legitimate legal excuse |
| Voidable contract | A valid contract that can be voided at the option of one of the parties |