During the development process, developers typically print Entity attributes, ValueObject contents at INFO level to track the execution flow. Invariably these log statements are never removed and get deployed in production. In many cases, the data being logged consists of PID (personally Identifiable) information .

Considering the increasing scrutiny of the regulatory authorities on data handling and data privacy, what seems like a minor logging issue can snowball into a major incident. Imagine, your PID info ( Name, DOB, Address, Credit Details ) being printed in the logs of your insurance company, for all the support personnel to view (and potentially misuse). Now you get the idea. Log any PID information at DEBUG LEVEL. In all other cases, log non-PID data such as Policy #, Claim #, Job # at any level.