The Federal Tax Identification number (Tax ID) or Employer Identification Number (EIN) in the case of US organizations, is required when creating the Blackbaud Merchant Services merchant account and is used to identify a business entity. This number should be 9 digits long. When entering your EIN please do not include any spaces or dashes.

For Canadian clients your full Registration Number is required.  If you are having trouble locating this information from your treasurer, you can look up your organization:
http://www.cra-arc.gc.ca/chrts-gvng/lstngs/menu-eng.html