Datuk Seri Najib Razak failed to exercise reasonable diligence to obtain the addendum he claims would allow him to be under house arrest when he filed for leave to initiate judicial review over the matter, the Federal Court heard on Wednesday (July 2).br br Attorney General Tan Sri Mohd Dusuki Mokhtar submitted that the former premier had every opportunity to obtain the addendum before the filing, but his action showed otherwise.