Can an employer rely on information they acquire after termination to allege that there was just cause for dismissal? Yes. Can an employer dismiss an employee for cause because they secretly recorded interactions at work? Yes.
Human rights complaint
The interview process can be a legal minefield for employers. One false step, one inappropriate question can give rise to a human rights complaint alleging that the employer has discriminated against the prospective employee.
Many employers in Canada use temporary workers supplied by employment agencies so that they don’t have to have full time employees and the obligations associated with full time staff such as severance, benefit and other monetary entitlements.