Keep in mind that CC transactions and Debit Card transactions are not handled the same way. The debit card transactions have the money come out of the account. This is why it takes some much longer for those transactions to resolve if the transaction isn't completed.

The only entity that can ask for an early release of authorization is the one that obtained the authorization. This prevents people (for example) from going out and buying a 2,500 computer then calling their bank to cancel the authorization.

Here is a link where you can get the information from the source.

http://usa.visa.com/merchants/become-a-merchant/how-a-visa-transaction-works.jsp