Because the Leverage Model relies on "trust through consensus", and also to help avoid Sybil Attacks, it is critical for the protocol to have confidence that each Borrower, Backer, and Auditor is a unique entity. Therefore, they must each be verified with a Unique Entity Check before they can participate.
Currently, the protocol uses Unique Identity (UID) as its Unique Entity Check provider. View the Unique Identity (UID) section of the documentation to learn about UID, how it works, and how to get started.