21727: Campaign registration failed due to missing parameter(s)

Twilio could not register your US A2P 10DLC campaign because the campaign creation request is missing one or more required parameters. Campaign registration requires core fields such as brandRegistrationSid, description, messageFlow, messageSamples, usAppToPersonUsecase, hasEmbeddedLinks, and hasEmbeddedPhone. Additional keyword and auto-reply fields may also be required depending on how your campaign handles opt-in, opt-out, and help flows.

• The campaign creation request omitted one or more required core fields.
• The request did not include the required messageSamples values for the campaign.
• The campaign allows end users to opt in by texting a keyword, but the request did not include optInKeywords or optInMessage.
• The campaign manages opt-out or help responses outside Twilio's default or Advanced Opt-Out handling, but the request did not include optOutKeywords, optOutMessage, helpKeywords, or helpMessage.
• A required parameter was included in the request structure but was sent without a usable value.

• Review the campaign creation request and include all required core parameters: brandRegistrationSid, description, messageFlow, messageSamples, usAppToPersonUsecase, hasEmbeddedLinks, and hasEmbeddedPhone.
• Provide two to five representative messageSamples that match the campaign description and selected use case.
• If recipients can subscribe by texting a keyword, include both optInKeywords and optInMessage.
• If you manage opt-out and help behavior yourself, include optOutKeywords, optOutMessage, helpKeywords, and helpMessage in the request.
• If you use Twilio's default opt-out handling or Advanced Opt-Out on the Messaging Service, confirm that configuration before submitting the campaign and only omit custom help and opt-out fields when that setup applies.
• Recheck the request payload against the A2P 10DLC campaign requirements, then resubmit the campaign registration.

• Gather the Required Business Information
• A2P 10DLC Campaign API Reference
• Troubleshooting A2P 10DLC Registrations