# 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. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.goldfinch.finance/goldfinch/goldfinch-v1/protocol-mechanics/uniqueentitycheck.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.