An Affidavit of Service is a sworn legal document made by the person who served legal documents on a party to court or tribunal proceedings. It provides formal, sworn proof that the documents were served in accordance with the applicable court rules and that the other party has been given proper notice of the proceedings. In Australia, the requirement for an Affidavit of Service arises under multiple legislative frameworks, including the Federal Court Rules 2011 (Cth), the Federal Circuit and Family Court of Australia (Family Law) Rules 2021 (Cth), the Uniform Civil Procedure Rules 2005 (NSW), the Civil Procedure Act 2010 and Supreme Court (General Civil Procedure) Rules 2015 (Vic), the Uniform Civil Procedure Rules 1999 (Qld), and equivalent rules in other Australian jurisdictions.

The affidavit is made by the deponent — who is the person who actually served the documents. This is commonly a professional process server, a solicitor's clerk or paralegal, a sheriff's officer, or a party to the proceedings themselves (in cases where the rules permit self-service). The deponent swears or affirms the truth of the statements in the affidavit before an authorised witness — typically a Justice of the Peace (JP) or a solicitor of the relevant Supreme Court.

The legal importance of an Affidavit of Service cannot be overstated. It is the primary evidence courts rely upon to confirm that a defendant or respondent has been given proper notice of the proceedings against them. Without proper proof of service, a court may not proceed to enter default judgment, grant an ex parte order, or determine the matter in the absence of the other party. If the affidavit is defective — for example, because the service was not effected in accordance with the rules, or the affidavit does not contain sufficient detail — the court may refuse to accept it as proof of valid service and may require re-service.

Australian courts draw a distinction between different types of service. Personal service (the most rigorous form) involves physically handing documents to the person to be served and is required for originating process (such as a Statement of Claim or Originating Application) under most court rules. Substituted service is permitted by court order where personal service is impractical and involves an alternative method of service (such as leaving documents at a known address, advertising in a newspaper, or serving by email). Service on a corporation is effected by leaving documents at the company's registered office or principal place of business. Each method of service must be accurately described in the Affidavit of Service.

An Affidavit of Service is needed whenever a party to court or tribunal proceedings must prove that legal documents have been properly served on the other party. This requirement arises across a wide range of court proceedings and legal contexts in Australia.

Originating process — the first legal documents commencing proceedings — almost always requires proof of personal service to be filed with the court. In the Federal Court of Australia, rule 10.20 of the Federal Court Rules 2011 (Cth) sets out the requirements for personal service. The Uniform Civil Procedure Rules 2005 (NSW) (Part 10) similarly require personal service of originating process and other specified documents. An Affidavit of Service filed with the court registry demonstrates compliance with these requirements and allows the matter to proceed.

Default judgment applications require the plaintiff to prove that the defendant was served and failed to respond within the required time. Without a valid Affidavit of Service, the court will not grant default judgment, even if the defendant has clearly been notified. The affidavit must accurately state the date, time, place, and method of service, as well as describe the person served.

Family law proceedings governed by the Federal Circuit and Family Court of Australia frequently require proof of service. The Family Law Rules 2021 set out specific service requirements for applications for divorce, parenting orders, and financial orders. A respondent in family law proceedings must be served with the application, and an Affidavit of Service must be filed to demonstrate compliance.

Injunction applications — particularly urgent or ex parte applications made without notice to the other party — require proof that the order, once made, was properly served on the restrained party. An Affidavit of Service is filed after the order is served to confirm service.

Tribunal proceedings before bodies such as the Administrative Appeals Tribunal (AAT), NCAT (NSW Civil and Administrative Tribunal), VCAT (Victorian Civil and Administrative Tribunal), and QCAT (Queensland Civil and Administrative Tribunal) also require proof of service in many circumstances, though the specific rules vary between tribunals.

Bankruptcy and insolvency proceedings under the Bankruptcy Act 1966 (Cth) require proof of service of bankruptcy notices and creditor's petitions. The Federal Court (Bankruptcy) Rules 2016 set out specific service requirements.

A valid Australian Affidavit of Service must contain several essential elements to be accepted by courts and tribunals as proof of proper service.

The proceedings must be clearly identified. The affidavit must state the name and location of the court or tribunal, the proceeding or file number, and the full names of the plaintiff (or applicant) and defendant (or respondent). This allows the court to identify the specific proceedings to which the affidavit relates.

The documents served must be precisely described. Each document served must be identified by its full title, date, and any reference number. For example: 'Statement of Claim dated 15 February 2026 in matter number 2026/12345'. Vague descriptions (for example, 'the court papers') are not sufficient. Where multiple documents are served together, each must be listed separately.

The method of service must be stated accurately and completely. The court rules specify the methods of valid service for different types of documents. The affidavit must state whether service was effected by personal service, ordinary service, service on a corporation at its registered office, substituted service by court order, service by post, or service by email or other electronic means. Where substituted service was used, the court order authorising that method must be identified.

The date, time, and place of service are critical. The affidavit must state the exact date and approximate time of service, and the full address where service was effected. This information allows the court to calculate whether time-sensitive procedural requirements have been met.

The identity of the person served must be established. For personal service, the affidavit should describe how the deponent identified the person served — whether the person verbally identified themselves, was recognised from a photograph, or produced identity documents. For service on a corporation, the name and role of the person who received the documents should be stated.

The authorised witness requirements must be satisfied. The affidavit must be signed by the deponent in the physical presence of an authorised witness, who must sign and state their full name, qualification, and address. Different courts specify different authorised witnesses — always check the applicable court rules.