The ISO logo is a registered mark and authorization to use the logo is granted only to ISO members. ISO is willing to consider requests to use the ISO logo on the Web for the sole purpose of links to the ISO Online Web site, so long as such links are presented in the context of an information resource, preferably in a directory-type listing of resources. Such links must not be presented in a misleading context or in such a way as to be understood to be an endorsement of an organization or product, nor in such a way as to harm ISO's image.

Requests to use the ISO logo for link purposes should be submitted via the ISO logo enquiry form, if possible mentioning the URL of the proposed page, which the ISO Central Secretariat would need to preview before being able to grant permission to use the logo.