Joseph Sugarman uses the term “Satisfaction Conviction” for something that convinces a prospect that they are going to be satisfied if they purchase your product or service.
As he describes it,

It basically conveys a message from you to your prospect that says, “Hey, I’m so convinced you will like this product that I’m going to do something for your benefit to prove how incredible my offer is.”

A common example is a better-than-money-back guarantee.
A good example is our Internet Marketing program – the fact that there is no commitment period required. One prospect just flat out told us, that he knew we were the real deal because there was no way we could stay in business on those terms if we weren’t delivering the goods.
People have become so skeptical of claims and promises, that this can be extremely important in your marketing. It is worth thinking about. It can become a key component of your branding, a major element of differentiating you from your competitors and a way to overcome your prospect’s jitters.