A few moments ago, I subscribed to the 4mations "Keep me updated" mailing list, out of curiosity of what it'll turn out to be (how did I get there anyway?!) I've got a past in email marketing so even though that subscribing should, in theory, be fine, I hesitated. I'm aware of how dodgy or how careless/naive some senders can be - recently, it took me a battle with an agency that shall remain nameless before they acknowledged that I'd requested repeatedly to be unsubscribed, so things like that peeve me off.
But I subscribed. And it was immediately followed by the familiar green tick mark from Campaign Monitor confirming I was subscribed.
And you know what? I definitely had a fuzzy feeling inside thinking "yup, I can trust this sender. Even if they write total rubbish, I'm confident I can unsubscribe, should there be a need." I bet you I would've bypassed the hesitation had the subscribe field been accompanied by the Campaign Monitor tick. Think that could help increase subscriptions or give users confidence?
What brands do that for you? What logos give you the confidence to hand over money, personal details or your precious time?