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Article:		Build a .NET App for Google Checkout
Subject:		New Order Notification issue
Date:		2007-11-30 22:55:22
From:		Imrankhan

I have implement code to send email to user in the case of new order notification but mail is sent 4 times to user.Any body can help me regarding this problem.

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New Order Notification issue
2007-12-03 23:45:29 momander [View]

This could happen if there is a timeout. If the Checkout system doesn't get a response from you within 10 seconds, it assumes you didn't get it and retries later. But you may have heard the notification and your response back to Google may simply have been delayed by general Internet slowness.
So you should detect and ignore duplicate notifications. The notification's serial-number remains the same for all retries, so this is a good fiel to check.

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