What does the term “Double Opt-In” mean?
“Double Opt-In” subscribers are the same as “Opt-In” subscribers, with one important difference. A double opt-in subscriber has confirmed their subscription by confirming their identity. When the subscriber joins a mailing list they receive a confirmation email, which normally requires them click a link within the message body, which confirms their true identity, and also prevents fraudulent or erroneous subscriptions. Only a small percentage of co-registration subscribers are really “Double Opt-In”, although it is common for unscrupulous email list providers to advertise their data as being “Double Opt-In”. This type of data is also much more expensive than typical “Opt-In” data, as well as being very hard to find. So if you think you are being mislead, check the source URL of the list (the website where the subscription occurred), and see if it is really a “Double Opt-In” list.
