Sender Registration and Verification
A source-linked guide to sender registration and how this authority layer fits into U.S. A2P messaging programs.
What this authority layer covers
10DLC, short-code, toll-free, vetting, and monitoring requirements used to register or verify U.S. A2P senders.
Authorities and official sources
Each entry explains what the source says, where its limits are, and what it does not establish.
Sender registration requirement · Current
A2P 10DLC / The Campaign Registry
Not yet reviewed · No current substantive review date recorded
Existing claims, limitations, assessment and historical verification labels are preserved; their presence is not evidence of a current review.
How this authority relates to messaging
SMS/MMS applicability has not been assessed for this record. Its inclusion identifies an authority for review; it does not establish applicability to your program.
What the source establishes
- U.S. A2P SMS/MMS over 10-digit long codes requires carrier-ecosystem brand and campaign registration through a Campaign Service Provider before sending.
Limits and important context
- Registration captures sender identity, use case, sample messages, call-to-action and opt-in disclosures, and STOP/HELP behavior; carriers may act against nonconforming campaigns.
Official and supporting sources
Source and review details
- Jurisdiction
- U.S. messaging ecosystem
- Source type
- Sender registration requirement
- Recorded operative status
- Current
Sender registration requirement · Current
TCR Brand Vetting and appeals
Not yet reviewed · No current substantive review date recorded
Existing claims, limitations, assessment and historical verification labels are preserved; their presence is not evidence of a current review.
How this authority relates to messaging
SMS/MMS applicability has not been assessed for this record. Its inclusion identifies an authority for review; it does not establish applicability to your program.
What the source establishes
- The Campaign Registry and its vetting providers use identity, tax-ID, nonprofit, government, and authentication checks and provide remediation or appeal paths for failed vetting.
Limits and important context
- Vetting affects registration confidence, throughput eligibility, and impersonation controls; failed or low-score results require correction or appeal.
Official and supporting sources
Source and review details
- Jurisdiction
- U.S. messaging ecosystem
- Source type
- Sender registration requirement
- Recorded operative status
- Current
Sender registration requirement · Current
Sole Proprietor 10DLC path
Not yet reviewed · No current substantive review date recorded
Existing claims, limitations, assessment and historical verification labels are preserved; their presence is not evidence of a current review.
How this authority relates to messaging
SMS/MMS applicability has not been assessed for this record. Its inclusion identifies an authority for review; it does not establish applicability to your program.
What the source establishes
- The Campaign Registry provides a distinct registration path for eligible small businesses or individuals without an EIN.
Limits and important context
- The path carries limited throughput and carrier-specific constraints and does not eliminate campaign, consent, or content requirements.
Facts that may change the result
- Is the registrant eligible for the sole-proprietor path, including the no-EIN criteria?
Official and supporting sources
Source and review details
- Jurisdiction
- U.S. messaging ecosystem
- Source type
- Sender registration requirement
- Recorded operative status
- Current
Sender registration requirement · Current
U.S. Short Codes / Common Short Code Administration registry
Not yet reviewed · No current substantive review date recorded
Existing claims, limitations, assessment and historical verification labels are preserved; their presence is not evidence of a current review.
How this authority relates to messaging
SMS/MMS applicability has not been assessed for this record. Its inclusion identifies an authority for review; it does not establish applicability to your program.
What the source establishes
- U.S. short-code programs require registry application, lease and payment, vetting, carrier review, and compliance with registry and monitoring rules.
Limits and important context
- Leaseholders, brands, and content providers remain subject to carrier review and the Short Code Monitoring Handbook.
Official and supporting sources
Source and review details
- Jurisdiction
- U.S. messaging ecosystem
- Source type
- Sender registration requirement
- Recorded operative status
- Current
Monitoring program · Current
Short Code Monitoring Program
Not yet reviewed · No current substantive review date recorded
Existing claims, limitations, assessment and historical verification labels are preserved; their presence is not evidence of a current review.
How this authority relates to messaging
SMS/MMS applicability has not been assessed for this record. Its inclusion identifies an authority for review; it does not establish applicability to your program.
What the source establishes
- The Short Code Monitoring Program evaluates opt-in disclosures, confirmation messages, STOP and HELP support, customer-care information, and message-and-data-rate disclosures.
Limits and important context
- Noncompliance may lead to remediation, lease suspension or termination, or inability to register or renew short codes.
Official and supporting sources
Source and review details
- Jurisdiction
- U.S. messaging ecosystem
- Source type
- Monitoring program
- Recorded operative status
- Current
Sender registration requirement · Current
Toll-free verification
Not yet reviewed · No current substantive review date recorded
Existing claims, limitations, assessment and historical verification labels are preserved; their presence is not evidence of a current review.
How this authority relates to messaging
SMS/MMS applicability has not been assessed for this record. Its inclusion identifies an authority for review; it does not establish applicability to your program.
What the source establishes
- Toll-free numbers used for U.S. and Canadian SMS must be verified with business identity, use-case, opt-in, sample-message, website, privacy, terms, HELP, and opt-out information.
Limits and important context
- Verification is necessary but not sufficient for delivery; restricted or pending traffic may be blocked, verified traffic remains filterable, and rejection reasons drive remediation.
- The final verification-status values are PENDING_REVIEW, IN_REVIEW, TWILIO_APPROVED, and TWILIO_REJECTED.
Official and supporting sources
Source and review details
- Jurisdiction
- U.S. messaging ecosystem
- Source type
- Sender registration requirement
- Recorded operative status
- Current
Industry guidance · Current
CTIA Short Code Monitoring Handbook
Not yet reviewed · No current substantive review date recorded
Existing claims, limitations, assessment and historical verification labels are preserved; their presence is not evidence of a current review.
How this authority relates to messaging
SMS/MMS applicability has not been assessed for this record. Its inclusion identifies an authority for review; it does not establish applicability to your program.
What the source establishes
- The CTIA Short Code Monitoring Handbook is the operational benchmark for recurring-message consent, disclosures, confirmation, HELP, STOP, customer care, and monitoring.
Limits and important context
- Applies to U.S. short-code programs and operates with registry, carrier, and program-specific requirements.
Official and supporting sources
Source and review details
- Jurisdiction
- U.S. messaging ecosystem
- Source type
- Industry guidance
- Recorded operative status
- Current
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