Sample Missing Opt-out Language

Why This Rejection Happens

Your "Sample Messages" section is missing the mandatory opt-out instructions (e.g., "Reply STOP to unsubscribe"). Every marketing message must include this.

Root Cause Analysis

The Fix

Append "Reply STOP to cancel" to at least one (ideally all) of your sample messages.

✓ Correct Sample

"Get 20% off your next order! Use code SAVE20. Reply STOP to cancel."

✗ Incorrect Sample

"Get 20% off your next order! Use code SAVE20." (Missing opt-out)

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What reviewers check for code 8100

Sample messages show reviewers what subscribers will actually receive. They must be realistic, identify the brand, match the declared use case, and include opt-out language in at least one sample (and in the first message of a marketing series). Placeholders such as [Name] are acceptable for variables, but generic text like "Test message" or content unrelated to the use case is rejected.

For code 8100 (Sample Missing Opt-out Language), 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 8100 comes from

Code 8100 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: sample messages for a dental practice

The example below uses a fictional dental practice, Brightside Dental, to show the difference between a submission that triggers code 8100 and one that passes.

Rejected:

Brightside Dental: Reminder of your cleaning on Tue 3/12 at 9:30am. Reply C to confirm.

Approved:

Brightside Dental: Reminder of your cleaning on Tue 3/12 at 9:30am. Reply C to confirm. Reply STOP to opt out.

Fix and verify before resubmitting

1. Write samples from real templates in your platform, not marketing copy written for the form.
2. Add the STOP / opt-out instructions where code 8100 flagged it, using the approved wording for Brightside Dental's program shown above.
3. Name the brand at the start of every sample.
4. Cover each message type the campaign will send (reminders, offers, alerts).
5. Include "Reply STOP to opt out" in at least one sample, and in all marketing samples.
6. Declare embedded links and phone numbers if any sample contains them.
7. Resubmit with a note that references code 8100 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 Brightside Dental:

Brightside Dental corrected the deficiency reported as code 8100 (Sample Missing Opt-out Language). Changes made: write samples from real templates in your platform, not marketing copy written for the form; add the STOP / opt-out instructions where code 8100 flagged it, using the approved wording for Brightside Dental's program shown above; name the brand at the start of every sample. 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 8100 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.
• Rewriting samples that no longer match the templates used in production.

Related rejection codes

• Code 2131: Verbal Script Missing STOP Instructions
• Code 2127: Verbal Script Missing STOP Instructions
• Code 2126: Opt-in Form Missing STOP Instructions
• Code 6003: Opt-in Msg Missing STOP Info
• Code 8101: Sample Missing Brand Name
• Code 6012: Sample Msg Missing Brand Name
• Code 30893: Invalid Sample Messages

Frequently asked questions about code 8100

Does code 8100 mean the whole campaign is non-compliant?

No. Code 8100 points to one gap: the STOP / opt-out instructions in your sample messages. 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?

Edit the sample message fields in the campaign so they mirror production templates. Subscribers must be told how to opt out before they agree.

Do I fix my live sample messages or only the campaign text?

The campaign samples, and the production templates they represent, so live traffic matches what was approved.