Troubleshooting

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Note:
Most troubleshooting for Sigma Synthetic is covered in the Troubleshooting section of Sigma Identity Fraud.

Known issues

High Synthetic scores for consumers younger than 18

Preventing synthetic fraud requires validating that consumers really exist.
Younger demographics (under 18) often have thinner files and lower coverage, which results in fewer positive signals that an identity is real.
This is an area of active improvement in each new model release.

Use of last 4 digits of national ID for synthetic detection

Synthetic models are not fully optimized when only the last 4 digits of a national ID are provided.
In these cases, the national ID is usually treated as not provided.
New features and modeling techniques are in development to increase accuracy and add intelligence for partial national ID inputs.