The title of the question illustrates my point. "Approved" is not really a clear definition of what I am attempting to say. Imagine a booking system. If a user requests to book an entity on a given time, this might be impossible due to already existing bookings. The user can put his booking on a waiting list, as there is a chance the original booking might be changed, or cancelled.
In case of this, the user should get an e-mail, where it says that the booking he or her tried to make, but had to put on a waiting list, now is not any longer on the waiting list, but it is in fact a valid confirmed booking. There is no payment relevant to the bookings in my case.
Another booking has been updated or deleted, so that your booking is now removed from the waiting list, and confirmed.
Most people will understand this just fine, but i have a feeling that "confirmed" can be ambigous. A booking can also be confirmed on a waiting list, without actually being... valid? I am missing a word here. Any other wordings I come up with, are embarrasingly long, and sounds like I'm talking to a 4-year old. Too verbose, without actually being clear...