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I have been using paypal's sand box to test my site, originally i was getting the message invoice already paid, however this was because i had creates a test buyer account but was using my actual paypal account email instead of creating a test seller account and using that. Now orders are working correctly with the sandbox, if i change paypal to live and set my correct email for the payments is that all i need to do?



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  • 3 months later...

You have already used that order ID on the same account. Set



a much higher order ID in your database and test on sandbox server.








Please enable cash on delivery (COD) from admin section and


place an order.

So next invoice ID will be changed and working on paypal payment gateway.


Note : Basically you need to move to a higher order id.









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