Can Multiple Domains Share the Same Trademark for BIMI?
Yes. A single trademark registration may be used across multiple validated domains subject to CA review, organizational validation, domain control verification, certificate product limits, and trademark-rights verification. The trademark confirms identity authority, but each domain must independently pass domain control validation. Organizational validation is completed once at the certificate level and does not repeat for each domain included in the certificate.
Valid Trademark Mapping Scenarios
- Using one corporate trademark to cover functionally distinct sending domains such as
company-sales.com,company-support.com, andcompany-notifications.com— the domain names do not need to share an identical root, provided all domains are under the same organization’s administrative control. - Deploying regional domains like
company.co.ukorcompany.dealongside the primary domain under a single corporate trademark entry. - Using a parent organization’s registration to cover subsidiary or departmental sending domains that use the same registered mark and logo.
- Including a domain the applicant does not control — every domain in the certificate must pass its own domain control validation, and any domain that cannot be verified will block or invalidate issuance for that entry.
- Exceeding the CA’s maximum domain count per certificate — each issuer sets its own SAN limit, and requests beyond that threshold require a separate certificate.
- Grouping domains that belong to different organizations, operate under different brands, or display different logos — shared certificates require a consistent organizational relationship and a single validated mark across all included domains.
The Validation Mechanism Explained
The BIMI record points to the SVG logo with the l= tag and to the certificate/evidence file with the a= tag. The certificate validates the relationship between the organization, domain, and approved logo. During validation, the issuing CA checks corporate records against recognized trademark offices or CA-accepted trademark records. Ownership of the trademark does not grant unrestricted deployment rights — organizational validation and proof of technical domain control over each target domain are mandatory requirements to prevent identity misuse.
A trademark acts as an identity anchor. Once a CA validates that your organization owns that asset, you can apply it to any sending domain under your administrative control, provided those domains pass validation and share the identical visual identity. For the mechanics of grouping multiple domains onto one certificate, see Can One BIMI Certificate Be Used for Multiple Domains?
Cross-Border Regional Domain Rules
If your business owns a trademark registered with a single recognized trademark office, you can use it to secure a regional email domain like brand.eu. The BIMI standard does not enforce geographic routing restrictions based on domain extensions. As long as the issuing CA can validate the trademark’s authenticity within recognized trademark offices or CA-accepted trademark records, that record is legally sufficient to clear verification for any global TLD or regional domain string in the application, subject to product volume limits.
For organizations expanding across regional domains, a Verified Mark Certificate for multi-domain trademark deployment covers global TLDs under a single trademark registration.