商务回函是企业、政府部门、金融机构及其他部门使用的、请求收件人直接做出反馈的函件。加拿大的商务回函业务分为国内回函和国际回函,允许用户在加拿大国内或世界180多个国家的范围内,从商函的收件人那里寻求反馈。用户通常将商务回函以插页的形式夹在(插在)出版物类邮件、广 Business Reply is used by enterprises, government departments, financial institutions and other departments, asking the recipient to make a direct response to the letter. Business response in Canada is divided into domestic and international reply letter back to allow users in Canada or more than 180 countries around the world, from the recipient of the letter seeking feedback. The user usually inserts the business reply in the form of an insert (inserted) in the publication mail