Affidavits are used in Courts and Tribunals including arbitrations, to provide the evidence-in-chief of witnesses. There are evidentiary, formal and procedural rules which apply to affidavits. Non-compliance can result in the evidence being excluded, the case being lost, or proceedings adjourned with adverse costs orders against the party, or against the lawyer who prepared the affidavit. Most young lawyers serve an informal apprenticeship drafting affidavits under the supervision of more experienced colleagues, learning from their experience and saving their own references and precedents. Some, less fortunate are 'thrown in at the deep end' without guidance or supervision. This book sets out to provide a reference for evidentiary, formal and procedural rules together with precedents.