How to Send Tips to ProPublica Illinois

Signal: +1-312-282-0273
WhatsApp: +1-312-282-0273
Email: [email protected]
Postal Mail: ProPublica Illinois, 211 West Wacker Drive, 3rd Floor, Chicago, IL 60606
Our Staff List:


Signal is a free messaging app for iPhone and Android that provides end-to-end encryption for messages and calls. Signal does not collect any metadata regarding who you are messaging: the service only retains your phone number and the last time you accessed the app.

Our Signal number is: +1-312-282-0273

If you’re concerned about someone knowing you are contacting ProPublica Illinois, we suggest that you enter our Signal number (or any reporter’s Signal number) directly in the app and not add it to your address book.

Also: Messaging us on Signal does reveal your phone number to ProPublica Illinois. So in some situations, it might even be better to use a separate phone for Signal communications.


WhatsApp is a popular messaging app owned by Facebook, which also provides end-to-end encrypted communications. Although the message contents are encrypted, the WhatsApp service may retain some metadata about who you are communicating with and when.

Our WhatsApp number is: +1-312-282-0273

Messaging us on WhatsApp may be preferable if you already use WhatsApp and don’t want to install another app on your phone. As with Signal, your phone number will be revealed to ProPublica Illinois, so you may want to consider other options (or use a separate phone) if you are concerned about that.


Our general tips address at ProPublica Illinois is [email protected].

To contact specific reporters, see our staff list. Many of our reporters have their own Signal numbers listed.

Although plain email is convenient, if your information is sensitive we recommend contacting us using the other options first.

Postal Mail

Postal mail is an excellent, easy way to reach ProPublica Illinois securely. U.S. postal mail without a return address is one of the most secure ways to communicate — authorities would need a warrant to intercept and open it in transit.

Don’t use your company or agency mailroom to send something to us. Mail your package or envelope from an unfamiliar sidewalk box instead of going to a post office. You can mail us paper materials or digital files on, for example, a thumb drive. Our mailing address is:

ProPublica Illinois
211 West Wacker Drive
3rd Floor
Chicago, IL 60606

If you can identify a reporter you want to reach, it’s worth noting that inside your package or envelope. You can also simply address it to ProPublica Illinois.

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