Economy and Trade

To prevent the drain of US currency from Canada, the government had the power to open mail to ensure that money was not being exported without permission.

The shipment of industrial materials was carefully regulated during the Second World War, especially when they were crossing an international border. Unbleached sulphite pulp is an ingredient used to make paper.

During the First World War, all adult Canadians were required to carry a certificate confirming that they had been "registered for national purposes."

Under the 1940 National Registration Regulations, every citizen had to carry proof of registration at all times. This card was issued to Nellie House of Hamilton, Ontario.