# FAQ **Q: How can I restrict a credential to a specific individual?**\ A: Specify the recipient DID when creating the offering. The wallet must prove ownership of that DID, ensuring only the intended recipient can claim it. **Q: Will updating a schema affect previously issued credentials?**\ A: No. Existing credentials reference their original schema version, ensuring compatibility and trust over time. **Q: How do wallets retrieve credentials?**\ A: Wallets scan the offering’s QR code, authenticate using the authorization endpoints, exchange the code for a token, and then request the credential. **Q: Can I rotate keys to enhance security?**\ A: Future enhancements will enable key rotation. Currently, keys are managed automatically by the Issuer Service. **Q: Will the Issuer Service support advanced privacy features?**\ A: Yes. Future releases will include ZKPs and Selective Disclosure to support privacy-preserving credential presentations. --- # 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.empe.io/develop/issuer/faq.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.