Marketing & measurement
Double opt-in
A sign-up process that asks a person to confirm their email request, usually through an emailed link.
In everyday use
A subscriber clicks a confirmation link before joining the mailing list.
What to keep in mind
It helps confirm control of the address; the consent wording still needs to be clear.
Also searched as: confirmed opt in
Further reading
Original explanation and example by Perspectism. Further reading may cover the wider subject, rather than this exact wording. Edition updated 7 October 2026.
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