​
What does this do?

  • Blacklisting Users: Prevent specific individuals (based on their ID’s) from making future transactions.
  • Blacklisting Devices: Block transactions coming from specific devices (e.g. phones) that are linked to suspicious activity.
  • Blaclisting Accounts: Stop transactions to/from particular bank or payment accounts that are associated with fraud.
  • Blaklisting VAS Receivers (Value-Added Service Receivers): These might be third-party services or merchants — blocking them prevents further interaction if they’re involved in fraudulent schemes.

​
How to blacklist an entity

There are two ways to do blacklist an entity (device, user, account or vas receiver):
  1. Over API
    You can call our endpoint to blacklist an entity
    See our blacklist API reference
  2. Sigma Dashboard
    Using our dashboard, you can also blacklist an entiry. Click on any transaction and click on action.
    blacklist-dashboard

    Example:

    Image shows search how to blacklist an entity on sigma dashboard
    Visit Sigma