If you can book a tee time online, you should be able to cancel a tee time online. And with GolfNow, you can't. You have to call GolfNow to cancel, but the fun doesn't stop there. Even though you might have called the golf course directly to cancel, GN requires that you stay on the line with their cust service rep while they call (again) the golf course to confirm the cancellation. It's kinda BS they keep the transaction fee regardless if u keep the tee time or not. It's about a 5% transaction fee... kind of salty. Buyer beware.
Nowhere in the email confirmation does it tell you how to cancel a reservation - u have to call GN.