A Justice of the Peace can witness official documents, administer an oath or affirmation and take an affidavit. A JP is available at Bassendean Memorial Library: first and third Saturday of the month from 9.15-11am first three Wednesdays of the month from 10am-11.30am Please be aware that our JPs are volunteers and there may be times when a JP is not available due to unforeseen circumstances. If the times that a JP is available at the Library does not suit you, please check the Department of Justice website for other JPs that might be in the area.