Amazon.com Inc. could be facing its first unionization battle in Canada after a Teamsters local filed for a union vote for workers at the e-commerce giant’s fulfilment centre near Edmonton. If the Alberta Labour Relations Board verifies application, all workers at the YEG 1 fulfilment centre in Nisku, Alberta, who were employed as of September 13 will be able to vote on joining the union. In order to have a union vote filing approved in Alberta, the union must demonstrate 40 per cent of workers at a given job site have signed a petition for union representation.