What Should Employers Know About Issue Estoppel?

A recent Alberta Human Rights Tribunal case emphasizes the risks and benefits of handling employment disputes across multiple legal forums. The Tribunal applied issue estoppel, preventing the employer from re-litigating a termination issue decided by the Alberta Labour Relations Board (ALRB). The ALRB had found the employee was terminated without cause, a conclusion the employer did not appeal. This decision became binding in subsequent human rights proceedings. The case underscores that employers should carefully assess their approach to unfavorable decisions in one forum, as these can shape outcomes in others. Failing to appeal unfavorable rulings could allow complainants to use them in further claims, raising significant legal and procedural challenges for employers.