Without severance payment

Is it illegal for an employer to refuse to pay severance and under which circumstances can they do this?  What legal avenues are available and when do you need to consult with an expert?  In his latest Globe and Mail video of a series, Daniel Lublin, Toronto Employment Lawyer explains  when severance can be refused and which legal forum is best for each case.  When can my company refuse to pay me severance? video can be watched in the Globe and Mail’s Career section.