Illinois Code § 2-607

§ 2-607.

Bills of particulars. (a) Within the time a party is to respond to a pleading, that party may, if allegations are so wanting in details that the responding party should be entitled to a bill of particulars, file and serve a notice demanding it. The notice shall point out specifically the defects complained of or the details desired. The pleader shall have 28 days to file and serve the bill of particulars, and the party who requested the bill shall have 28 days to plead after being served with the bill. (b) If the pleader does not file and serve a bill of particulars within 28 days of the demand, or if the bill of particulars delivered is insufficient, the court may, on motion and in its discretion, strike the pleading, allow further time to furnish the bill of particulars or require a more particular bill to be filed and served. (c) If a bill of particulars, in an action based on a contract, contains the statement of items of indebtedness and is verified by oath, the items thereof are admitted except in so far as the opposite party files an affidavit specifically denying them, and as to each item denied states the facts upon which the denial is based, unless the affidavit is excused by the court. (d) If the party on whom a demand for a bill of particulars has been made believes that the party demanding it is not entitled to the particulars asked for, he or she may move the court that the demand be denied or modified. (Source: P.A. 86-646.)