Why This Rejection Happens
The Opt-in Confirmation Message (the first message sent after a user subscribes) failed to inform the user how often they will be messaged.
Root Cause Analysis
Acceptable Phrases
- "Message frequency varies" (Safest/Most common)
- "4 msgs/month" (Specific)
- "One-time passcode" (For transactional)
The Fix
✓ Correct Message
"Welcome to Brand Updates! Msg frequency varies. Msg&data rates apply. Reply HELP for help, STOP to cancel."
✗ Incorrect Message
"You are subscribed to updates. Msg&data rates apply." (Missing frequency)
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What reviewers check for code 6004
The opt-in confirmation message is the first text sent after someone joins. Carriers require it to confirm the enrollment and restate the program terms, because it is the subscriber's written record of what they agreed to. Reviewers check the sample confirmation message you submit for the brand name, a description of the program, message frequency, "Msg & data rates may apply", HELP instructions and STOP instructions.
For code 6004 (Opt-in Msg Missing Frequency Disclosure), the missing piece is the message frequency disclosure. Subscribers must be told how often they will hear from you, for example "up to 4 msgs/month" or "Msg frequency varies". Use a specific cap for recurring marketing programs where possible; "varies" is acceptable for event-driven alerts.
Where code 6004 comes from
Code 6004 is a campaign review reason code used to report a specific deficiency found during manual campaign vetting. CSPs surface it in the rejection notice alongside any other codes found in the same review, so check for companion codes before resubmitting. It is marked High severity: it blocks approval, but it is fully fixable by correcting the submission and resubmitting.
Example: opt-in confirmation message for a fitness studio
The example below uses a fictional fitness studio, Pulse Cycle Studio, to show the difference between a submission that triggers code 6004 and one that passes.
Rejected:
Pulse Cycle Studio: You're subscribed to class reminders and membership offers. Msg & data rates may apply. Reply HELP for help. Reply STOP to opt out.
Approved:
Pulse Cycle Studio: You're subscribed to class reminders and membership offers. Up to 8 msgs/month. Msg & data rates may apply. Reply HELP for help. Reply STOP to opt out.
Fix and verify before resubmitting
- Submit the exact confirmation text your platform sends, not a paraphrase.
- Add the message frequency disclosure where code 6004 flagged it, using the approved wording for Pulse Cycle Studio's program shown above.
- Keep it within two segments if possible so carriers do not truncate the disclosures.
- Trigger the flow with a test number and compare the live message with the submitted sample.
- Make sure no marketing offer is placed before the required disclosures.
- Confirm the same message is sent for every opt-in path (keyword, web, verbal).
- Resubmit with a note that references code 6004 and quotes the corrected message frequency disclosure.
Sample resubmission note
Many CSPs let you add a note for the reviewer when you resubmit. A short, specific note shows what changed and speeds up the second review. Example for Pulse Cycle Studio:
Pulse Cycle Studio corrected the deficiency reported as code 6004 (Opt-in Msg Missing Frequency Disclosure). Changes made: submit the exact confirmation text your platform sends, not a paraphrase; add the message frequency disclosure where code 6004 flagged it, using the approved wording for Pulse Cycle Studio's program shown above; keep it within two segments if possible so carriers do not truncate the disclosures. All URLs, keywords and auto-replies were re-tested from an external network before this resubmission, and the campaign text now matches the live opt-in exactly.
Common mistakes that keep code 6004 coming back
- Omitting frequency because messages are irregular, instead of writing "Msg frequency varies".
- Stating a cap and then sending more messages than the cap allows.
- Disclosing frequency on the terms page only.
- Editing the sample in the campaign but not the auto-reply the platform actually sends.
Related rejection codes
- Code 2124: Verbal Script Missing Frequency Disclosure
- Code 3005A: CTA Missing Frequency Disclosure
- Code 2135: Opt-in Instructions Missing Frequency Disclosure
- Code 2115: Opt-in Form Missing Frequency Disclosure
- Code 6006: Opt-in Confirmation Msg Missing
- Code 6005: Opt-in Msg Missing Fee Disclosure
- Code 6003: Opt-in Msg Missing STOP Info
- Code 6002: Opt-in Msg Missing HELP Info
Frequently asked questions about code 6004
Does code 6004 mean the whole campaign is non-compliant?
No. Code 6004 points to one gap: the message frequency disclosure in your opt-in confirmation message. Fix that gap, check the rest of the submission against the same checklist, and resubmit. Reviewers often list only the first deficiency they find, so a full self-check prevents a second rejection.
Where exactly should the message frequency disclosure appear?
Put the required elements in the opt-in confirmation text itself, ideally in the first segment. Subscribers must be told how often they will hear from you, for example "up to 4 msgs/month" or "Msg frequency varies".
Do I fix my live opt-in confirmation message or only the campaign text?
Both. Change the auto-reply in your messaging platform and paste the identical text into the campaign's opt-in message field.