Duplicate Consent Records: Why a Stable Event ID Is Essential for Compliance

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When a customer withdraws marketing consent, that single action can trigger multiple system deliveries due to network failures, webhook timeouts, or queue replays in distributed architectures. Without a mechanism to distinguish a redelivered message from a new customer decision, consent history logs may incorrectly record the same withdrawal twice. This creates serious risks for Privacy, Compliance, and Legal teams who rely on accurate consent histories to understand user intent. A stable, unique event ID — assigned once per consent action and retained across retries — allows receiving systems to recognize and discard duplicates without creating false records. Industry standards such as the CloudEvents specification from the Cloud Native Computing Foundation already recommend this approach for exactly this reason.

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