To receive marketing emails from a company, a person must sign up via a form submission. Then, an email will be sent that requires a click to confirm the opt-in. Which type of opt-in process is being used?

The process described is a double opt-in. This is a two-step subscription method where an individual first provides their email address through a sign-up form (the first opt-in) and then must click a confirmation link in a follow-up email to verify their subscription (the second opt-in). This method is a best practice for ensuring a high-quality mailing list, as it confirms that the email address is valid and that the owner explicitly consents to receive marketing communications, which helps with compliance and deliverability.

A. Single opt-in: This method adds a person to a mailing list immediately after they submit their information, without requiring a secondary confirmation step via email.
B. Automatic opt-in: This is not a standard industry term. It could imply pre-checked boxes or adding contacts without explicit consent, which is contrary to the described confirmation process.

1. Adobe Experience League - Marketo Engage Documentation. In the "Set Up Double Opt-in" article, the process is defined: "Double opt-in is a two-step process where a user subscribes to a mailing list and then receives a confirmation email with a link they must click to verify their subscription." This directly matches the scenario in the question. (Source: Adobe Experience League, Marketo Engage Docs, Set Up Double Opt-in, Section: "How Double Opt-in Works").

2. Adobe Experience League - Marketo Engage Documentation. The "Subscription Management" documentation further clarifies the distinction: "With single opt-in, a person is considered subscribed as soon as they complete a form... With double opt-in, a person who fills out a form is sent a confirmation email and must click a link in it to be considered subscribed." (Source: Adobe Experience League, Marketo Engage Docs, Subscription Management, Section: "Opt-in").