nils2010 Posted June 29, 2011 Share Posted June 29, 2011 Hi, Total beginner here, so any help explained with this in mind wuld be great! I have installed the website payments standard module as per the instructions in: http://www.oscommerce.com/forums/topic/331996-how-to-setup-paypal-website-payments-standard/ Now I'm testing it in sandbox and all works fine until I review my order information in PayPal, and Click - Pay. Then it gives the error message: This invoice has already been paid. For more information, please contact the merchant. Return to <[email protected]> At this time, we are unable to process your request. Please return to sales@myshopname and try another option. Can anyone explain how to solve this issue? I have not installed the ipn.php mod, as I am unsure of what it will do. With this in mind, I have tried every option, i.e. in my paypal "Profile" I have the return URL as www.mysite.com/checkout_process.php instead of the ipn.php mod file. Is this the issue? Is there a known fix? Can anyone help!? I am running OSC v2.2 Quote Link to comment Share on other sites More sharing options...
Guest Posted June 29, 2011 Share Posted June 29, 2011 Nils, Enable COD payments, then complete a couple of transactions using COD. Then, try PayPal again. Chris Quote Link to comment Share on other sites More sharing options...
nils2010 Posted June 29, 2011 Author Share Posted June 29, 2011 Nils, Enable COD payments, then complete a couple of transactions using COD. Then, try PayPal again. Chris Hi Chris, thanks for the quick reply. I enabled COD payments, did 2 transactions this way, and then went back to PayPal, and received the same error message. I am totally confused by this now, any help would be appreciated. Many thanks, Nils. Quote Link to comment Share on other sites More sharing options...
Guest Posted June 29, 2011 Share Posted June 29, 2011 Nils, Normally, with a couple of COD transactions the error would be resolved because the transaction ID auto increments. Unfortunately, since what I suggested has worked for me in the past, I don't have any other suggestions for you. Chris Quote Link to comment Share on other sites More sharing options...
nils2010 Posted June 29, 2011 Author Share Posted June 29, 2011 Hi Chris, Ok no worries, thanks for looking and suggesting an idea. Anyone else? Quote Link to comment Share on other sites More sharing options...
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