Awards
Awards are a trust factor; therefore, if an organization or individual has achieved a widely-recognized and/or credible award, it should prominently publish this fact.
ULTIMATE UX DICTIONARY
Celebrities & Authority Figures
The power of celebrity in selling has long been established . But you can use images, statements and other content to convey authority figures, such as doctors, nurses, policemen, celebrity chefs and captains of industry so as to reinforce persuasive messages.
Peer Advice, Reviews, & Ratings
A factor in both trust and persuasion. In trust, users expect to see customer ratings and reviews against the goods or services offered for sale by reputable e-commerce sites. In persuasion, ratings and review comments support both ‘social proof’ and ‘social learning’ persuasion techniques.