Edit found this on paypal site:
As a merchant, what can I do with an authorization?
You can capture funds, which is a request to process the payment your buyer authorized. If successful, the capture moves funds from your buyer's account to your PayPal account.
You can also reauthorize, which offers you a new honor period for your authorization.
Finally, you can void the authorization, which removes your ability to capture funds on the authorization, and returns PayPal balance funds to the buyer if applicable.
Note: If the capture is performed outside the honor period, there is a possibility the funds will not be available at that time.