What does TCR Error Code 8100 mean?

Error 8100 indicates that one or more of your sample messages lacks the mandatory opt-out instructions required by carriers for A2P 10DLC compliance.

Do transactional messages need opt-out language?

Yes, for the purpose of TCR registration samples, ALL message types (including transactional and customer care) must demonstrate how a user can opt out, typically by including 'Reply STOP to opt out'.

Can I use 'Unsubscribe' instead of 'STOP'?

While 'Unsubscribe' is a valid keyword, 'STOP' is the most universally recognized and preferred keyword by carriers. Using 'Reply STOP to opt out' is the safest way to ensure approval.

Fix TCR Code 8100: Sample Missing Opt-out Language | MyTCRPlus

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TCR Code 8100

Sample Missing Opt-out Language

Compliance Missing

Rejection Rate

20%

Avg Fix Time

5 Min

Success Rate

99%

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

Best Practice: While not strictly required for 2FA, nearly all other use cases (Marketing, Alerts, Notifications) require explicit opt-out instructions in the sample messages.

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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