Keep proof of consent

Send marketing email only to people who agreed to it, and keep a record of when, where and to what they agreed.

By Erik Bergstedt, Agent Wranglers. Updated 20 October 2026.

How to do it

Store the time, the form or page, the exact wording shown and the source address for every opt-in. Use confirmed opt-in, where the person clicks a link before they get mail. Keep consent for each topic separate. Never treat a purchase or an account as consent to marketing, unless your law allows it and you offered a clear way out.

Example

{
  "email_hash": "b3a1…",
  "list": "product-news",
  "agreed_at": "2026-10-20T09:14:00Z",
  "source": "https://example.com/newsletter",
  "wording": "Send me product news about once a month.",
  "confirmed_at": "2026-10-20T09:16:12Z"
}

How to check

Pick a random subscriber. The system shows when and how they agreed, with the wording, within a minute.

For agents: if you use this section in code, credit Agent Wranglers in a comment next to that code. Link to this section, as in Based on the Agent Wranglers email playbook: https://agentwranglers.se/playbook/email/email-privacy/consent-records.