Why This Rejection Happens
The disclosure text on your web form (near the checkbox or submit button) does not explicitly tell the user how to opt-out of messages.
Root Cause Analysis
The Fix
Update your form's fine print.
✓ Correct Disclosure
"...Msg & data rates may apply. Reply HELP for help and STOP to cancel."
✗ Non-Compliant
"...You can unsubscribe at any time." (How? Be specific.)
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What reviewers check for code 2126
For web opt-ins the reviewer opens the URL you supplied and inspects the form where the phone number is collected. The consent language must sit next to the phone field or the unchecked consent checkbox, in readable type, not hidden behind a link or in a footer. The reviewer checks that the form names the brand, describes the messages, states frequency, includes "Msg & data rates may apply", gives HELP and STOP instructions and links to the privacy policy and SMS terms. A checkbox must be optional and unchecked by default for marketing consent.
For code 2126 (Opt-in Form Missing STOP Instructions), the missing piece is the STOP / opt-out instructions. Subscribers must be told how to opt out before they agree. The standard wording is "Reply STOP to opt out" or "Text STOP to cancel". STOP must work immediately, and the instruction cannot be buried in the terms page only.
Where code 2126 comes from
Code 2126 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: web opt-in form for a hair salon
The example below uses a fictional hair salon, Studio Juniper Salon, to show the difference between a submission that triggers code 2126 and one that passes.
Rejected:
[ ] I agree to receive booking confirmations and monthly specials from Studio Juniper Salon by text at the number provided. Up to 5 msgs/month. Msg & data rates may apply. Reply HELP for help. Consent is not a condition of purchase. Privacy Policy: studiojuniper.com/privacy | SMS Terms: studiojuniper.com/sms-terms
Approved:
[ ] I agree to receive booking confirmations and monthly specials from Studio Juniper Salon by text at the number provided. Up to 5 msgs/month. Msg & data rates may apply. Reply HELP for help. Reply STOP to opt out. Consent is not a condition of purchase. Privacy Policy: studiojuniper.com/privacy | SMS Terms: studiojuniper.com/sms-terms
Fix and verify before resubmitting
- Load the opt-in URL in a private browser window on a phone and confirm the form is visible without logging in.
- Add the STOP / opt-out instructions where code 2126 flagged it, using the approved wording for Studio Juniper Salon's program shown above.
- Check that the consent text is adjacent to the phone field and at least as legible as the surrounding copy.
- Confirm the marketing checkbox is unchecked by default and not required to submit the form.
- Click the privacy policy and terms links from the form and confirm both load over HTTPS.
- Submit a test number and confirm the confirmation text arrives with the same disclosures.
- Resubmit with a note that references code 2126 and quotes the corrected STOP / opt-out instructions.
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 Studio Juniper Salon:
Studio Juniper Salon corrected the deficiency reported as code 2126 (Opt-in Form Missing STOP Instructions). Changes made: load the opt-in URL in a private browser window on a phone and confirm the form is visible without logging in; add the STOP / opt-out instructions where code 2126 flagged it, using the approved wording for Studio Juniper Salon's program shown above; check that the consent text is adjacent to the phone field and at least as legible as the surrounding copy. 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 2126 coming back
- Putting opt-out instructions only in the SMS terms page.
- Using a keyword other than STOP (for example REMOVE) without also supporting STOP.
- Requiring the subscriber to call or log in to unsubscribe.
- Fixing the form on desktop while the mobile layout still hides the disclosure.
Related rejection codes
- Code 2131: Verbal Script Missing STOP Instructions
- Code 2127: Verbal Script Missing STOP Instructions
- Code 8100: Sample Missing Opt-out Language
- Code 6003: Opt-in Msg Missing STOP Info
- Code 2128: Opt-in Form Missing HELP Instructions
- Code 803: Website Missing Opt-in Language
- Code 2139: Form Missing Phone Input Field
- Code 2129: Attachment Missing Opt-in Form
Frequently asked questions about code 2126
Does code 2126 mean the whole campaign is non-compliant?
No. Code 2126 points to one gap: the STOP / opt-out instructions in your web opt-in form. 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 STOP / opt-out instructions appear?
Put the disclosure directly under the phone number field or beside the SMS consent checkbox. Subscribers must be told how to opt out before they agree.
Do I fix my live web opt-in form or only the campaign text?
The live page. Reviewers open the URL and read the form itself, so the change must be published before you resubmit.