19012: When updating a contact at least one field should be updated

This error occurs when your contact update request does not include any supported field changes. Send at least one supported update field such as first_name, middle_name, last_name, legal_name, preferred_name, unique_customer_provided_id, or custom_fields.

• The request body is empty, or it does not include any contact fields to update.
• The payload omits all fields that this endpoint allows you to update, which are first_name, middle_name, last_name, legal_name, preferred_name, unique_customer_provided_id, and custom_fields.
• The request includes only unsupported fields, so Twilio does not receive any valid contact updates.

• Add at least one supported update field before you retry the request. You can update first_name, middle_name, last_name, legal_name, preferred_name, unique_customer_provided_id, or custom_fields.
• Remove unsupported fields from the payload and resend only fields that this endpoint accepts for contact updates.
• Validate the request body before you send it so the payload is well formed and includes at least one supported field to update.
• Retry the request after you correct the payload.

• Contact API
• Compliance Toolkit for Programmable Messaging
• Troubleshooting Twilio