⚖️ Validators

CNJ Lawsuit Number Validator

Validates Brazilian CNJ lawsuit numbers by checking the MOD 97-10 check digit and decodes year, court branch, tribunal and originating unit.

Case numbers (one per line)

Works with or without the mask. Up to 500 lines at a time.

What each part means

CNJ Resolution 65/2008 fixed the format NNNNNNN-DD.AAAA.J.TR.OOOO: a seven-digit sequential number per unit and year, a two-digit check number, the filing year, the branch of the Judiciary, the court inside that branch and the originating unit.

The check digits follow ISO 7064 MOD 97-10, the same scheme used by IBAN account numbers: append two zeros to the 18 remaining digits, take the remainder modulo 97 and subtract it from 98. A number ending in 8.26 belongs to the São Paulo state court; 5.02 is the 2nd Labour Court region.

Checking a Brazilian CNJ lawsuit number

Paste the number that arrived by message and find out whether it is intact before trying the court portal. In 0001234-03.2026.8.26.0100, the 8.26 says the case runs at the São Paulo state court and the 0100 points to the originating unit. When the check digits fail, the page shows the corrected number ready to copy, which is usually the real reason people look this up.

The layout comes from CNJ Resolution 65/2008: seven digits of sequential number per unit and year, two check digits, four for the filing year, one for the branch of the Judiciary, two for the court and four for the originating unit. Branch 4 is the Federal Justice, 5 is the Labour Justice and 8 is the State Justice. In the electoral, state and state military branches the next pair follows the official list of states.

The check digits use ISO 7064 MOD 97-10, the same scheme as an IBAN: take the remaining 18 digits, append two zeros, compute the remainder modulo 97 and subtract it from 98. One detail catches many people out: in the CNJ table Sergipe is 25 and São Paulo is 26, so 8.26 means the São Paulo court. Pasting a hundred numbers straight from a spreadsheet works too, with a summary and CSV export.

Frequently asked questions

Why does the court portal reject a number that looks right?

Almost always because one digit changed along the way and broke the check. A 3 copied as an 8 is enough. Validate it here: when the check digits fail, the corrected number field shows what they should be for those same 18 remaining digits, and that is usually the number the system accepts.

How do I find the court from the number alone?

The digit after the year gives the branch and the following pair gives the court. In 2026.5.02, the 5 is the Labour Justice and 02 is its 2nd Region. In 2026.8.13, the 8 is the State Justice and 13 is Minas Gerais. This page translates both fields and prints the full name of the court.

What does an originating unit of 0000 mean?

It marks a case filed at the court itself rather than at a first-instance division. That happens with original jurisdiction actions, such as writs of mandamus against an authority. In every other number, the last four digits identify the forum, the district or the division where the case was distributed.

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