A Canada Post truck is seen on a road in Montreal on Tuesday, Dec.17, 2024. Canada Post is resuming operations after a month-long strike by more than 55,000 postal workers left letters and parcels in limbo.THE CANADIAN PRESS/Christinne Muschi

Canada Post bosses and the Canadian Union of Postal Workers squared off in a downtown Ottawa hotel on Monday, the first day of hearings at the industrial inquiry commission convened by the labour minister.