http://www.insurance.illinois.gov/Prop_Cas_IS3_Checklists/statutes/IllinoisSupremeCourtRule%20236.pdf
Illinois Supreme Court Rule 236
Rule 236. Admission of Business Records in Evidence
(a) Any writing or record, whether in the form of any entry in a book or otherwise, made as a memorandum or record of any act, transaction, occurrence, or event, shall be admissible as evidence of the act, transaction, occurrence, or event, if made in the regular course of any business, and if it was the regular course of the business to make such a memorandum or record at the time of such an act, transaction, occurrence, or event or within a reasonable time thereafter. All other circumstances of the making of the writing or record, including lack of personal knowledge by the entrant or maker, may be shown to affect its weight, but shall not affect its admissibility. The term "business," as used in this rule, includes business, profession, occupation, and calling of every kind.
Committee Comments
Paragraph (a)
Paragraph (a) of this rule is a revision without change in substance of subsection 1732(a) of title 28 of the United States Code, generally known as the Federal Business Records Act. This act reflects the modern approach to the admissibility of business records as evidence.
In Illinois, the trend has been similar. In People v. Small, 319 Ill. 437, 477, 150 N.E. 435 (1926), the Supreme Court held bank records admissible on the basis of a foundation laid by the officers in charge of the records, stating, "The business of this great commercial country is transacted on records kept in the usual course of business and vouched for by the supervising officer, and such evidence ought to be competent in a court of justice. Modern authority sustains this view."
