# ISV and multi-brand registration
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If you are an Independent Software Vendor (ISV) or platform that sends messages on behalf of other brands, additional requirements apply.

## Brand contact email
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The brand contact must represent the **actual brand owner**, not the ISV sending on its behalf. The brand contact email must use the end-brand's domain.

**Priority order:**

1. **Preferred:** End-brand's own domain (for example, name@yourbrand.com)

1. **Acceptable for government brands:** Official parent agency domain (for example, if the brand is a government program, the parent department's domain is acceptable)

1. **Not sufficient:** ISV/vendor domain — unless there is a publicly verifiable reference on the end-brand's website or privacy policy explicitly authorizing the ISV to act as brand contact

**Important**  
The reviewer verifies the brand contact by checking whether the email domain connects to the brand in the registration. If you are an ISV, you must provide a contact at the end-brand's organization, not your own.

For government brands: If the brand is a government program or agency, use an official government domain email. If the program doesn't have its own domain, the parent department's domain is acceptable.

## Affiliate marketing restriction
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Each RCS agent must represent a single brand. If your campaign description suggests that multiple brands will send messages through one agent, the registration is denied as affiliate marketing.

**Compliant (ISV pattern):** "ExamplePlatform sends appointment reminders and service notifications on behalf of ExampleBrand."

**Non-compliant:** "Our platform enables multiple healthcare brands to send messages to their customers." — This describes affiliate marketing (multiple brands, one agent).

## ISV checklist
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+ Brand contact email uses the **end-brand's domain** (not your ISV domain)
+ Brand contact person is someone at the end-brand's organization
+ Registration clearly identifies the single brand this agent represents
+ Campaign description references a single brand, not multiple brands
+ If ISV domain must be used: publicly verifiable authorization exists on the end-brand's website or privacy policy