# 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.