Housing discrimination in the US violates Article 25 of the Universal Declaration of Human Rights which guarantees adequate housing for all. Discrimination most often occurs based on race, religion, disability, family status or nationality. From 2002 data, over 25,000 complaints were filed with the Department of Housing and Urban Development (HUD) which estimates actual cases of discrimination are twice as high. HUD is responsible for enforcing fair housing laws and individuals can file complaints with HUD if they believe they have experienced discrimination. Key Supreme Court cases and laws like the Fair Housing Act and Age Discrimination Act have helped define and prohibit housing discrimination.