Hello,

We have been using the new eWAY API for a number of months. Recently we have found duplicate credit card charges being processed through eWAY. It is happening intermittently with the transactions in eWAY occurring only one second apart. In most cases the customer is unaware that the double charge has occurred and everything looks normal from our side also, we only realise when we check the transaction report from eWAY.
I have contacted eWAY and they cannot see any issue and believe that the customer is probably double clicking at payment however I have tried to reproduce this and have not found that this is a problem. We have been unable to find a pattern that might explain what is happening, in most cases the customer is existing and has ordered on our website many times before.

We have also had two customers contact us after receiving the following error message at checkout: {"Message":"Access Code Not Found : Active,StartedShared","Errors":null}. I am not sure if this is related or a separate issue.

Thank you for any help with this.

Anne

Hi Anne
Part of the process with eWay is that they send us an access code and a URL this is used to send the card number to be charged. But it would seem logical to not allow this access code to be used twice which would avoid the duplicate payments. Can you as eWay if there is a way to do that?

Vince

Click Here for Shopping Cart Software
Click Here to sign up for our newsletter
Click Here for the latest updater

Thank you Vince.

I have contacted eWAY and just as you have indicated, their log files showed two transaction attempts against the same access code. They have raised it as a case to investigate further. Hopefully this won't take too long -

Anne

Hi Vince,

Eway have gotten back again regarding the duplicate transactions and have identified the issue as a bug which has been added to their 'backlog to fix'. They are not giving an ETA of when it will be fixed.
They maintain that when receiving two payment requests within seconds that it is usually caused by customer's double clicking on the payment button. While we wait for this bug to be fixed, they have recommend disabling the payment button after it has been clicked once to prevent further double submissions. Is this something that already occurs or can be fairly easily implemented?

Thank you again for your help.

Anne

Hi Anne
If you open this file in notepad...
vsadmin/inc/inccart.php
...and then search for this...
<form method="POST" action="<?php print $formactionurl?>" id="payment_form">
...and replace with this...
<form method="POST" action="<?php print $formactionurl?>" id="payment_form" onsubmit="isvalc=isvalidcard(this);if(isvalc){document.getElementsByClassName('widecheckout3')[0].disabled=true};return isvalc">
...it should do what you need.

Vince


Click Here for Shopping Cart Software
Click Here to sign up for our newsletter
Click Here for the latest updater