I recently put together a document that describes our Issuer implementation of Transaction Velocity Checks during the authorization process. We use a facility called the Velocity Manager to implement authorization rules that are based on frequency of transactions over a given time period. Velocity profiles can be used to implement extensible velocity-based logic.

Here is the data-structure that defines our Velocity Limits:

Here is a snapshot of a configured Velocity Limit based on Accumulated Transaction Amounts:

Here is a snapshot of a configured Velocity Limit based on Transaction Counts over a given period:

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