* `Unsent` (value: `"Unsent"`)
* `Unsigned` (value: `"Unsigned"`)
* `PartiallySigned` (value: `"PartiallySigned"`)
* `DeclinedToSign` (value: `"DeclinedToSign"`)
* `PrematurelyEnded` (value: `"PrematurelyEnded"`)
* `PendingCompletion` (value: `"PendingCompletion"`)
* `Completed` (value: `"Completed"`)
* `Disposed` (value: `"Disposed"`)