A privacy seal is a type of trust seal or trustmark granted by third party providers for display on a company's website. Companies pay an annual fee to have an image of the third party provider's seal pasted onto their homepage or privacy policy page. Users can oftentimes click on the seal and be redirected to the web assurance seal service's website which verifies the validity of the privacy seal. They are meant to act as a visual assurance for consumers that the website in question meets a certain standard of privacy. The idea of a privacy seal originates with its physical manifestation – companies have long sought seals of approval like Good Housekeeping to be placed on their tangible products in order to draw in customers who value "quality". While all web assurance seal services follow the guidelines set by the Federal Trade Commission, some providers may have additional requirements. Checks are then conducted on a regular or random basis to ensure compliance. Privacy seals can be applied to various types of e-commerce websites. Some seal providers even create a special privacy seal that is geared toward a certain product like mobile apps or accounting. There are many privacy compliance technology companies, most notably TRUSTArc, CPA Canada WebTrust, PwC Privacy and BBBOnline.