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Transaction Duplicated in AuthorizeNet

Thread began 8/29/2012 1:44 pm by joerg431091 | Last modified 8/29/2012 2:28 pm by Jason Byrnes | 315 views | 1 replies |


Transaction Duplicated in AuthorizeNet

Hi all,

Just wondering whether someone experienced the same issue and might have an answer for this:

We noticed several times already that a purchase on our website results in a duplicated transaction in AuthorizeNet with the exact same Invoice ID / Session Number. These transactions are usually just about 30 seconds to 1 minute appart.

The problem is, that our order processing department only receives one e-mail confirmation but in this case the customers credit card is charged twice.

We have not had a chance to get the exact feedback from those customers about what happened but we suspect that these customers might have submitted the order - might have received a failure notice (maybe due to a connection issue) - clicked the back button and clicked submit again. It almost looks this way since the system lets both charges go through with the exact same invoice/session ID.

Any thoughts or experience about what could cause this?

Thanks a lot and best regards,


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Jason ByrnesWebAssist

add the following code to the success page after the </html> tag to destroy the sessions:


// Initialize the session.
// If you are using session_name("something"), don't forget it now!

// Unset all of the session variables.
$_SESSION = array();

// If it's desired to kill the session, also delete the session cookie.
// Note: This will destroy the session, and not just the session data!
if (ini_get("session.use_cookies")) {
$params session_get_cookie_params();
setcookie(session_name(), ''time() - 42000,
$params["path"], $params["domain"],
$params["secure"], $params["httponly"]

// Finally, destroy the session.
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