{
  "id": "MSG-054",
  "slug": "msg-054",
  "title": "Universal opt-out keywords must be supported in copy and configuration",
  "statement": "STOP, END, CANCEL, UNSUBSCRIBE and QUIT must all be supported, both in the keyword configuration and honoured in practice.",
  "rationale": "These five are recognised at handset and carrier level regardless of configuration, so a consumer using any of them has effectively opted out whether your platform noticed or not. Declaring them aligns your suppression list with what has already happened.",
  "layer": "MESSAGE_CONTENT",
  "layerSlug": "message-content",
  "object": "campaign.optout_keywords",
  "severity": "BLOCKING",
  "detectability": [
    "DETERMINISTIC"
  ],
  "failureClass": "RETRY_FIELD",
  "authorities": [
    "CTIA",
    "FCC",
    "TCR"
  ],
  "applicabilityText": "Applies to every 10DLC registration.",
  "universal": true,
  "remediation": "Add all five universal keywords to the configuration, ideally alongside REVOKE and OPTOUT.",
  "example": "STOP, QUIT, END, REVOKE, OPTOUT, CANCEL, UNSUBSCRIBE",
  "phase": "approval",
  "automated": true,
  "url": "https://ekas.io/rules/10dlc/message-content/msg-054/",
  "markdown": "https://ekas.io/rules/10dlc/message-content/msg-054.md",
  "registry": "https://ekas.io/rules/10dlc/",
  "updated": "2026-07-25",
  "licence": "CC BY 4.0 — https://creativecommons.org/licenses/by/4.0/"
}