21900: DltPEId is invalid

The DltPEId value in your request is invalid. This error occurs when you send a DLT Principal Entity ID that does not match the required format or length for Twilio's Messaging APIs.

• The DltPEId value contains invalid characters.
• The DltPEId value is too short or too long.
• The DltPEId value was entered with extra spaces or formatting characters.
• The DltPEId parameter does not match the DLT registration details for your sender or template.
• Your application is sending the wrong parameter value in the API request.

• Verify that the DltPEId value exactly matches the Principal Entity ID provided during your DLT registration.
• Remove any extra spaces, separators, or unsupported characters from the DltPEId value.
• Verify that your application is mapping the correct DltPEId to the correct sender and message template.
• Validate the request payload before you send it to Twilio.
• If you manage messaging compliance for traffic to India, review your registered sender, template, and entity information to confirm that all values match.

• Programmable Messaging API
• Send an SMS message
• Alphanumeric Sender ID for India