How can I write to an offender
There are two ways to write an offender. Regular U.S. mail may be sent to the offender at the facility at which they are incarcerated. Envelopes must be properly addressed and include the offenders full name, IDOC Identification number, and valid return address. Envelopes must be addressed as follows:
Offender's Name and IDOC ID#
City, State, Zip
Additional information regarding mail and what may be sent through the mail may be found under IDOC "Policies related to offender mail" section on the Policies webpage at Mail, Telephone, and Visiting.