Question: eg. JBB Inc. Headquarters 20 West RiverCenter Blvd Covington KY 41011 USA

Answer: 
This error can be caused by an incorrect **merchant ID**, an **incorrect access code**, or if the order originates from an **unregistered URL**. Make sure that all three of these values are correct. 

> 
> For your security, CCAvenue does not report exactly which of these three values might be in error.
> 
> 
> 

**Update:**

1. You can find CCAvenue setup for ASP.net from here: <http://aravin.net/complete-guide-integrate-ccavenue-payment-gateway-asp-net-website-screenshot/>
2. Also, you can find steps to solve the 10002 here: <http://aravin.net/how-to-test-ccavenue-payment-gateway-in-localhost-avoid-error-code-10002-merchant-authentication-failed/>
Error Code: 10002 Merchant Authentication failed.
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Don't worry... It happens to the best of us.
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This might be due to incorrect MERCHANT ID, WORKING KEY or ACCESS CODE. The most likely it is possible due to incorrect URL so to make sure this is implemented on the Registered Domain for Testing URL/Live url for which the API keys are issued.

Please check the registered ccavenue Testing/Live URL for the same.