Why This Rejection Happens
The first message sent to a subscriber (the "Opt-in Confirmation") failed to identify the brand. Carriers mandate that every messaging thread begins with clear sender identification, usually "Brand Name: [Message Text]".
Common Triggers: Sending "You are subscribed!" without the brand name prefix, or using a nickname that doesn't match the registered Brand Name.
Root Cause Analysis
Primary Triggers
- Anonymous Entry: The user opted in via keyword but the auto-response didn't confirm WHO they subscribed to.
- Inconsistent Naming: The message says "Joe's Deals" but the brand is registered as "Joseph Smith LLC" without a clear DBA link.
- Missing Prefix: Failure to start the very first message with the Brand Name (e.g., "Brand: Hello...").
Required Elements
| Element | Required Format | Example |
|---|---|---|
| Brand Prefix | Start of message | "[Brand]: You are subscribed..." |
| Consistency | Match Registration | Must match the "Display Name" field. |
| Timing | First Message | Crucial for the Opt-in Confirmation SMS. |
Step-by-Step Remediation
Review Your "Opt-in Message"
Go to your campaign registration. Look at the "Opt-in Message" or "Sample 1" field. Does it start with your brand name?
✓ Compliant Message
"North Star Logistics: You are subscribed to shipping alerts. Msg freq varies. Reply HELP for help, STOP to cancel."
✗ Non-Compliant Message
"Thanks for subscribing! Use code WELCOME10 for 10% off."
(Who is this from?)
Configure Your Platform
Update your auto-responder or welcome flow. Hardcode your Brand Name at the very beginning of the message template.
Check Character Limits
If your brand name is long ("The Association of American..."), use a compliant abbreviation, but ensure that abbreviation is listed as a "DBA" or "Display Name" in your brand registration.
Carrier-Specific Requirements
T-Mobile
- Requires the brand name to be the first text in the message body. This is a primary visual check for compliance.
AT&T
- Will flag messages as spam if the sender identity is ambiguous. "Info:" or "Alert:" is not a valid brand name.
MyTCRPlus Tools That Can Help
Message Flow Validator
Paste your Opt-in Message to verify if the Brand Name is correctly positioned and formatted.
Brand Consistency Checker
Ensures the name in your message matches your registered legal entity.
Pre-Resubmission Checklist
- The message starts with "[Brand Name]:".
- The Brand Name matches my registration.
- I have updated the "Opt-in Message" sample in the portal.
- I have configured the actual welcome message on my platform.
Common Mistakes to Avoid
❌ "Hey it's [Name]"
For professional A2P messaging, "Hey it's John" is not sufficient unless "John" is the registered brand. Use "John from [Brand Name]".
❌ Assuming the Number ID is Enough
Consumers don't know who owns "833-555-0199." You must state your name in the text body.
Expected Timeline
Related Rejection Codes
This guidance provides general information about 10DLC compliance requirements. Establishing sender identity is a core component of trusted messaging. Organizations should ensure every message clearly identifies the sender to reduce opt-outs and complaints. MyTCRPlus does not provide legal advisory services or regulatory representation.