> For the complete documentation index, see [llms.txt](https://docs.goldfinch.finance/goldfinch/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.goldfinch.finance/goldfinch/goldfinch-v1/protocol-mechanics/uniqueentitycheck.md).

# Unique Entity Check

Because the Leverage Model relies on "trust through consensus", and also to help avoid [Sybil Attacks](https://en.wikipedia.org/wiki/Sybil_attack), 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)](/goldfinch/goldfinch-v1/unique-identity-uid.md) as its Unique Entity Check provider. View the [Unique Identity (UID)](/goldfinch/goldfinch-v1/unique-identity-uid.md) section of the documentation to learn about UID, how it works, and how to get started.