The latest move from Canada Post comes after the union filed an unfair labour practice complaint with the Canada Industrial Relations Board over the layoffs of striking employees, saying the layoffs are an "intimidation tactic" that violates the Canada Labour Code.

Canada Post has also been crushed by the boom in Canadians using other low-cost delivery services. In terms of e-commerce, Canada Post’s market share has dropped to 29 per cent from 62 per cent in 2019.

Canada Post has confirmed it had laid off some full- and part-time employees during the strike, arguing that the conditions of their employment had changed due to the dispute. Union lawyers have countered that the move represents an unfair labour practice.