In Illinois, every civil court case has a unique docket number. A cases's docket number is written on every court order you receive.
Each time you want to file a motion, you must include the docket number for the case. For family law cases (Domestic Relations), every docket number will contain the year the case started, followed by a "D".
For example, if the case started in 2020, the docket number would be:
If the documents you received for your case don't have a docket number, they may have an administrative case number instead.