Spain's High Court will decide this Friday whether to extradite pro-Palestinian philanthropist Fergie Chambers to the United States. Chambers was arrested in Ibiza in July by Spain's National Police and has been held on remand at Aranjuez prison in Madrid. His lawyers say the extradition request is based on “bad faith” in how US authorities translated key documents sent to Spain. Represented by the law firm of former judge Baltasar Garzón, Chambers' defence says it found 12 “substantial alterations” to the translation. It points to changes that it says intensified the alleged conduct, including replacing “direct action” with “direct violence”, adding “three fires” connected to protests against US company Elbit Systems, and describing the “activation” of smoke canisters as “detonation”. The defence argues the changes could affect how the offences are classified in Spain by altering assumptions about violence, dangerousness, intent and perpetration. It says the alterations were then repeated in documents used in the Spanish proceedings. The United States accuses Chambers of money laundering, public disorder and alleged conspiracy to commit public disorder. The defence disputes the public disorder and conspiracy allegations, saying the case relates to protests in the US against an Israeli arms manufacturer, and that similar incidents had already been tried with sentences of around 60 days. On the money laundering charge, the lawyers say the US complaint does not challenge the origin of the funds, but the ideological nature of the intended use. They also insist the US criminal complaint does not accuse Chambers of any offence linked to terrorist organisations. Chambers is accused of seeking release from custody, and in October Spain's Criminal Chamber of the National High Court rejected his application. The court said the risk of him absconding remained, because he refused extradition and has sufficient financial means to relocate to another country that could avoid transfer to the US. It ruled that withdrawing his passport would not be enough. The High Court's extradition decision is expected after this Friday’s hearing.