WASHINGTON - The United Nations blacklist of alleged terrorism financiers is facing legal challenges and dwindling support, The Washington Post report said Sunday. Challenges to the Un list, which contains 503 individuals, businesses and groups, are coming from courts in Europe, including the European Court of Justice in Luxembourg, which ruled the blacklist is illegal because it lacks accountability and a mechanism for those on it to challenge their inclusion, the newspaper said in a front-page report. British and French courts have also challenged the blacklist's legal standing, citing the Un 's refusal to let the blacklistees see the evidence against them. "You can be added to the list for political reasons, without any serious evidence of wrongdoing," Armando Spataro, the deputy chief prosecutor in Milan, Italy, told the newspaper. "There is a risk of making many, many mistakes". US and European diplomats said that while backing for the Al-Qaeda sanctions was sky-high at first, especially after the Sept. 11, 2001, attacks, enthusiasm later waned in some countries, partly because of opposition to the U.S.-led war in Iraq, the Post said.