The question of single vs double opt in for list building is one that has been around for what seems like forever. It’s almost on a par with whether the chicken or the egg came first and – like that conundrum – there’s no consensus on the correct answer.
Single opt in means that your potential list member just has to take a simple action such as putting their email address into a box on your site and pressing a submit button of some sort.
Double opt in means that they have to do the first action (naturally, otherwise they wouldn’t stand a chance of getting on your list at all) and then they have to click a confirmation link that – hopefully – doesn’t get sent to their spam folder.
So, which method is better?