Update an entity customer affiliated with your platform. Your platform must be configured for this endpoint before use.

This is a partial update — send only the fields you want to change. All fields are optional except submitter_email, which identifies the caller.

💡 Use the Examples dropdown on the request body below to see common update scenarios (tax info, mailing address, adding people, W-8BEN-E / W-9 certification, and more).

Adding vs. updating associated persons

• Sending control_persons or beneficial_owners here adds new persons to the entity — it does not modify existing ones.
• To update a person already attached to the entity (Control Person, Beneficial Owner, or Board Member), call PATCH /participants/entity/{participant_code}/users/USER_CODE (PatchUserBody) with that person’s user_code.
• Board members cannot be added or changed here — they are only accepted at creation time via POST /participants/entity/new.