10 ILCS 5/14-5.1

Each judge of election shall be identified as such by a suitable badge or label authorized and issued by the board of election commissioners that: (1) clearly states it is authorized by the board of election commissioners; (2) identifies the individual as an election judge; and (3) contains a unique identifier that consists of the precinct number and assigns the judge of election a single letter. In accordance with this Section, the badge shall follow the form of "Precinct number, Judge letter".