Fill in the blanks: A customer makes a purchase from your company and submits the form with a box checked to receive marketing emails. This box was checked by default. You proceed to send them marketing emails. This can be described as ______ and ________.

This scenario describes implicit consent because the customer did not actively choose to receive emails; rather, a pre-checked box assumed their consent. While they made a purchase, their agreement to receive marketing emails was implied by not unchecking the box. It is single opt-in because the customer was added to the email list immediately after submitting the form without any further confirmation step, such as clicking a link in a confirmation email. Double opt-in would require an additional confirmation step. Explicit consent would involve the customer actively checking an unchecked box to indicate their desire to receive emails.