# Controllers Controller is an entity that manages access rights to assets, allowing you to restrict who can buy, sell, or trade them. Controllers can only be created by the asset issuer and have different statuses: * Active — the controller is recorded on the blockchain and ready to use. * Updating — the controller is in the process of being written to the blockchain. * Draft — the controller is created in the system but not yet recorded on the blockchain (the transaction needs to be signed). Controllers provide flexible access management and let you safely delegate rights to other users. --- # 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://teos-docs.coreledger.net/resources/using-the-teos-api/concepts/controllers.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.