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How to search using Cook County case numbers

When searching Cook County cases to file into an existing case, you must follow the specific case number format provided by the eFileIL system. You will not be able to find cases using old formats. The format rules listed below is applicable to all eFiling Service Providers (EFSP).

In General…
1. Remove all spaces and dashes from case numbers
2. Always use a 4 digit year (YYYY)
3. Any letters must be CAPITALIZED
4. Use leading zeros for case numbers

Specific formatting and examples for Cook County divisions

Chancery Division

Format: YYYYCH12345

For Chancery Division case numbers, you must use the 4 digit year, capitalize CH for division code, and case numbers are 5 digits long.

Civil Division

Format: YYYY1123456

For the Civil or municipal division, you must use the 4 digit year, exclude the “M” and use only the district number, and case numbers are 6 digits long.

County Division

Format: YYYYCOTD123456

For the County Division, you must use the 4 digit year, capitalize the division code, and case numbers are 6 digits long.

Domestic Relations Division

Format: YYYYD123456

For the Domestic Relations Division, you must use the 4 digit year, capitalize “D” for division code, and case numbers are 6 digits long.

Law Division

Format: YYYYL123456

For the Law Division, you must use the 4 digit year, capitalize “L” for division code, and case numbers are 6 digits long.

Probate Division

Format: YYYYP123456

For the Probate Division, you must use the 4 digit year, capitalize “P” for division code, and case numbers are 6 digits long.

If you have any questions, please do not hesitate to reach out to us at (844) 340-3096 or email us at [email protected].

Author

  • Lindsey Dean leads strategic marketing and growth at InfoTrack, where she is focused on exploring and sharing concepts and ideas in accessible and nuanced ways. She has been a writer and researcher in the legal profession for more than 6 years and has authored reports and articles on eFiling, service of process, trends in the legal support field, and more.