Many employees are notorious for printing extra copies of presentations that may contain insider information. Doing so may leave confidential data, such as business strategy, budget, and timelines, accessible for anyone to see. This insider information may prove to be beneficial for fraudsters who wish to leverage this new-found knowledge in other ways.
A company's financial results are considered extremely confidential and are often released publicly only at regular intervals (i.e quarterly, monthly etc.). This type of information is key to assessing the performance of a business and if it gets into the hands of the wrong person, it can be detrimental to that business.
Resumes, cover letters, background checks, and employment contracts are all confidential documents that should be kept secure as they contain personally identifiable information (PII) that is specific to each employee.