How can I make sure the minFraud service is as effective as possible for me?

If you are using minFraud Legacy, you may wish to upgrade to one of our current minFraud services if possible. The current minFraud services can accept additional inputs for improved scoring, and they can also return additional outputs. A summary of what’s new can be found here.

If your integration method requires that you use minFraud Legacy, we highly recommend upgrading to the latest version of minFraud Legacy through your account, if you are not using version 1.3 already. Upgrading from version 1.0 gives you access to the riskScore, which represents the likelihood that a given transaction is fraudulent. The riskScore should be used instead of the deprecated score (no longer supported since January 1, 2014) to determine whether to accept, reject, or manually review orders. The riskScore is based on sophisticated statistical modeling and real-time data feeds to better indicate whether a given order is fraudulent; the score is based on a simple formula and should no longer be used.

The more input fields you pass to the minFraud service, the more accurate the riskScore will be. In particular, we recommend passing at least the /billing/city, /billing/postal, /billing/country, /credit_card/issuer_id_number, /email/address, /device/user_agent, and /device/accept_language fields.

We recommend you use the Device Tracking Add-on for the minFraud service on your site. The add-on helps catch fraudsters who change proxies while they are browsing your website or between visits to your website.

You can help us customize and improve the riskScore for you by reporting fraud and chargebacks (as well as false positives) to us.

In the MaxMind account portal, we provide the Custom Rules functionality to minFraud Score, minFraud Insights, and minFraud Factors customers. You can use custom rules to automate the dispositioning of transactions (accept, reject, or queue for manual review). Learn more in our Custom Rules Guide.

And, as always, you can contact our support team at with any questions pertaining to the minFraud service. We are happy to manually review your account and make specific suggestions on how to improve the performance of the service for you!