Union Tank Car Co. relied on business records of third parties — without any testimony from employees of those other firms — to quantify damages caused by breach of a lease for 47 railcars.On appeal to the Illinois Appellate Court from a $1.27 million judgment in a Cook County bench trial, NuDevco Partners, which guaranteed the lease, argued that the trial judge erred in ruling that Union Tank satisfied the requirements for the business records exception to the hearsay rule. NuDevco also claimed that best …