A focused query
Choose a supported identifier and limit the search to an authorized purpose.
CHECK Intelligence
Investigate exposure. Handle the report carefully.
CHECK is an intelligence workflow for researching supported identifiers such as emails, usernames or domains. Use it as an input to investigation, with clear permission and careful handling of returned information.
No phone number or email required for core Hat use.
The useful difference
A clearer way to handle sensitive work.
Review the findings
Treat matches and risk labels as investigative leads, not proof that a person or system is compromised.
Protect the report
Follow the report’s delivery controls and your organization’s handling rules for sensitive data.
How it works
Three deliberate steps.
Open CHECK
Use the intelligence channel and available query controls in the messenger.
Run an authorized query
Enter a supported identifier; data sources and availability can vary.
Validate before acting
Corroborate relevant findings and agree on an appropriate response.
Know the boundary
Choose controls with clear expectations.
CHECK must interpret a query and produce a report. Its processing and upstream-source boundaries differ from ordinary user-to-user Hat encryption. Results may be incomplete, outdated or incorrect; do not assume a clean result proves safety.
Review the security evidenceQuestions, answered
Before you get started.
Where can I use CHECK Intelligence?
Open City of Hats to review the controls available for your client, content and plan. The app shows applicable requirements before you proceed.
What should I check before sharing sensitive information?
Verify the recipient, use a supported device and choose appropriate access and retention rules. Review the Security Evidence Center for boundaries and evidence status.
City of Hats is free to use. Feature availability and limits vary by plan and client. Premium is optional; review current limits in the app or on the plans page.
Explore what matters next
Build the workflow around your work.
Start with a Hat
Give sensitive work its own space.
Start free. Choose your controls as the work requires them.