what is a BN
Business Number (BN) registration. The. is a numbering system that simplifies and streamlines the way businesses deal with the federal government. It is based on the idea of one business, one number.Not all businesses require a. and. program accounts so it is important to read Do you need a program account before registering.he. is requesting that all new registrations provide the Name and the Social Insurance Number (SIN) of at least one owner/director of the business and the Major Business Activity (MBA) when registering.