or non·can·cel·la·ble
not subject to cancellation: a noncancellable insurance policy.
Is it cancelable or cancellable?
The word cancellable (which is also but less commonly spelled cancelable) describes something, such as a contract or policy, that can be canceled—that is, that can be made no longer valid or effective.
What does Noncancelable mean?
adjective. not subject to cancellation: a noncancellable insurance policy.