Jonathan Simpson owns a construction company. One day a subcontractor calls him saying that he needs a replacement check for the job he completed at 1437 Elm Street. Jonathan looks up the job on his accounting program and agrees to reissue the check for $12,750. The subcontractor says that the original check was for only $10,750. Jonathan looks around the office and cannot find the company checkbook or ledger. Only one other person has access to the accounting program. Jonathan calls you to investigate. How would you proceed?