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Mastercard Expert Monitoring Solutions {#payments-mc-ems}
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Mastercard Expert Monitoring Solutions provides a predictive, behavior-based fraud score in real time during authorizations for card-not-present transactions. The score indicates the likelihood that the requested transaction is fraudulent and the type of fraud that is suspected.  
To assign the fraud score for a transaction, Mastercard compares the customer's transaction data to their transaction behavior history and to a regional card-not-present fraud detection model. The resulting score is returned in the body of the response message.

Limitations
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This feature is supported on Mastercard Payment cards issued in the US only.  
This feature is supported with `Visa Platform Connect` only.

Requirement {#payments-mc-ems_mc-ems-process-prereq}
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Contact customer support to enable Mastercard Expert Monitoring Solutions for your account. After this feature is enabled for your account, Mastercard returns a fraud score for all your card-not-present authorization requests for Mastercard payment cards issued in the US.

Related Information
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* See [Mastercard Expert Monitoring Solutions Processing](/docs/cybs/en-us/payments/developer/ctv/so/payments/payments-processing-mastercard-intro/payments-mc-ems-intro.md "") for information that shows you how to obtain the transaction fraud score determined by Mastercard Expert Monitoring Solutions.  
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