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What is a UCI?

A UCI, or Unique Client Indentifier forms a one-to-one relationship between a client and a credit card number. The merchant has the ability to provide MyGate with a unique-client-identifier (such as a customer ID) when processing a transaction. MyGate then stores the card number used by that client, and will flag or fail (depending on how you decide to configure) later transactions used by this client with a different card number. This ensures that the credit card being used by the client is the card previously used for transacting.
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