One sign of discrimination is differential treatment – differing treatment of individuals, where the differences are based on a prohibited ground of discrimination such as the individual's race, color, religion, sex, nationality, age or disability status. To avoid complaints of differential treatment, companies can evaluate the questions and investigations they use in making employment decisions. These should be applied consistently. For example, if a company investigates conviction records of job application, it should investigate them for all applicants, not just for applicants from certain racial groups. Companies may want to avoid some types of questions altogether.
The practice of forcing an employee to retire for the reason of age is a human rights issue and falls under the regulation of human rights legislation.