The benefits of displaying the Verified Merchant Seal are clear:
Reassure consumers who may be concerned about the security of making online purchases.
Cut down on shopping cart abandonment due to security and trust concerns.
Align your company with one of the industry's best known payment brands.
Log into the Merchant Interface to configure the Web site domain(s) on which you would like to display the Verified Merchant Seal. Then copy and paste the generated seal HTML to the desired area(s) of your Web site(s).
When a customer clicks on your Verified Merchant Seal, a site verification window appears showing that you are an active Authorize.Net merchant.
Rebecca Bolte, ButtonMakers.com