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POST
Register an incorporation participant
Registers a reusable Commenda OS person or business entity as a participant in an incorporation. Participants are the incorporation-specific layer that assigns roles such as DIRECTOR and SHAREHOLDER. The underlying person or business entity remains reusable across Commenda OS for customer records, documents, registrations, and other entity-management work. The resource.resourceId value is the numeric Commenda OS person or business entity id.
The response returns the registered participant and the refreshed incorporationValidation for the incorporation. Registering a participant does not by itself make the underlying Commenda OS resource complete. The incorporation validation also checks required fields on the referenced person or business entity, such as legal names, email, nationality, date of birth, address, and corporate registration data when those fields are required by the selected jurisdiction.

Role and resource matrix

For Singapore private limited companies, use this matrix when mapping the requirements response into participant registration calls: Create individual resources with POST /partner/commenda-os/customers/{customerId}/persons. Create corporate resources with POST /partner/commenda-os/customers/{customerId}/business-entities. For Singapore private limited companies, writes that would make shareholder ownership exceed 100 are rejected. Ownership below 100 is accepted while the customer is still entering shareholders, but incorporation validation remains incomplete until the total equals 100. Use PATCH /partner/incorporation/{incorporationId}/participants/{participantId} to replace an existing participant’s roles or correct ownership percentages.

Role examples

Director only:
Shareholder only:
Corporate shareholder:

Authorizations

x-api-key
string
header
required

Path Parameters

incorporationId
string
required

Incorporation identifier returned by create or list endpoints.

Body

application/json
participantType
enum<string>
required

Type of reusable Commenda OS resource registered to the incorporation.

Available options:
INDIVIDUAL,
CORPORATE
resource
object
required
roles
object[]
required
Minimum array length: 1

Response

Participant registered successfully

participant
object
required
Example:
incorporationValidation
object
required