# FAQ **Q: How do I integrate the Verifier into my existing authentication flow?**\ A: Use the server-side Verifier Client library to establish verification endpoints and the front-end library to display QR codes and connect SSE. This complements or replaces traditional authentication methods (e.g., passwords). **Q: Can the Verifier handle multiple credential types?**\ A: Yes. By configuring different verification flows and query requirements, you can validate a wide range of credential schemas. **Q: How do I know if a credential issuer is trustworthy?**\ A: The Verifier relies on EMPE Blockchain-anchored DIDs. Credential signatures and DID Documents ensure the authenticity of issuers. **Q: What if a verification request expires or fails?**\ A: The Verifier sets validity periods. If a request expires, simply create a new one. For failures, check logs and verify your configuration and credential definitions. **Q: Can I customize the verification workflow?**\ A: Yes. The Verifier’s configuration, queries, and callback handlers allow tailoring the flow to your specific application requirements. --- # 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/verifier/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.