Adapting the method used by US organizations on housing discrimination, the Legal Defense Bureau for National and Ethnic Minorities (NEKI) uses a method of testing to collect evidence when there is an allegation of discrimination in order to challenge it in court.   Once the Bureau receives a complaint of discrimination, testers are sent out to the alleged place of discrimination. Testing typically involves sending out a Roma and a non-Roma person with similar characteristics and qualifications, with the only major difference between the individuals is ethnicity. The testers record their experiences on assignment forms immediately after the test, offering details of their experiences. The test coordinator (either the organization or the attorney) can then evaluate whether or not differential treatment has taken place.   The results of these tests are then used as evidence in discrimination court cases.