# FinPass ### What is FinPass? FinChain is building a compliant financial layer on the blockchain. FinPass is an on-chain universal decentralized identity (UDID) system built by FinChain for users, and it is the core application of the FinChain on-chain ecosystem. Link your wallet address with your identity information to upgrade to FinPass, which serves as your universal ID within the FinChain ecosystem, unlocking more compliant on-chain application scenarios. ### How to Upgrade FinPass? You can click the **\[Upgrade FinPass]** button in the **"Account - Digital Wallet"** list. Simply complete a simple wallet signature authorization to complete the FinPass upgrade application; no fees are required. ### How to Use FinPass? During the RWAs market and the minting and redemption of FUSD (FinChain Dollar), the system or smart contract will check whether your wallet address has obtained FinPass eligibility. Otherwise, you will see some prompts, and you must complete the FinPass upgrade according to the prompts to continue these transaction operations. ### Uniqueness FinPass is a universal decentralized identity (UDID) you use on FinChain and other partner chains that trust by FinChain. Therefore, a wallet address that has obtained FinPass will be associated with your account authentication information. To ensure the security of your account and assets, please ensure that you and only you own this wallet address. Currently, once your wallet address has been upgraded to FinPass, it cannot be revoked. --- # 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://finchain.gitbook.io/finchain-docs/en/rwas/finpass.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.