19013: Contact requires at least one name, unique_customer_provided_id, or channel

This error occurs when you submit a contact without any field that Twilio accepts to identify or describe that contact. Include at least one of first_name, middle_name, last_name, legal_name, preferred_name, unique_customer_provided_id, or channel.

• The contact payload did not include any of the required fields.
• The request only included other contact data, so Twilio could not find a supported name field, unique_customer_provided_id, or channel value in the payload. This is an inference based on the required-field validation for this error and the supported contact field validation used by related contact errors.

• Update the contact payload to include at least one supported field before you retry the request. You can use first_name, middle_name, last_name, legal_name, preferred_name, unique_customer_provided_id, or channel.
• If you identify contacts from your own system, send unique_customer_provided_id so you can create and retrieve the contact consistently.
• If you identify contacts by channel, include channel data in the contact object instead of sending an empty contact record. When you later fetch the contact, use either unique_customer_provided_id or channel, not both.

• Contact API
• Compliance Toolkit for Programmable Messaging
• Consent Management API