The following statuses are available on the authorisation object:

Awaiting submission
The authorisation has not yet been processed through a payment service provider.
This status is used for direct debits, and indicates the authorisation has been processed but is not yet in force. Direct debit authorisations have a lead time of a few days before they become active - see Timing cycles for details. This status isn’t relevant for card authorisations, as they become active (or fail) instantly.
In force
The authorisation has been confirmed, is valid, and can be used to authorise a payment.
The authorisation has been cancelled at the request of the payor, or at your request.
The authorisation is not valid / no longer valid and cannot be used to take payments.
The authorisation has expired, and can no longer be used to take payments.