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Authorisation (Form 21)

Form 21 is the Authorisation a self-represented co-party signs so another co-party can file and serve documents for them in a South Australian civil case.

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Word document from South Australian Courts (CourtSA)'s website.

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Format
Word (DOCX)
Category
Court form
Form number
Form 21
Version
v76158541
Last verified
7 October 2026

Supreme Court of South Australia · District Court of South Australia · Magistrates Court of South Australia · Environment, Resources and Development Court of South Australia · Youth Court of South Australia · Uniform Civil Rules 2020

Preview of the first page of Authorisation (Form 21)
Preview - first page of the form

For law practices: this form maps to the published matter-field vocabulary, so your practice management system fills it from your matter data - on your own machine. Practice management systems can fetch and assemble it through the document assembly API.

What Form 21 is for

Rule 25.7 of the Uniform Civil Rules 2020 (SA) deals with self-represented co-parties: co-applicants, co-respondents, co-third parties, co-interested parties and co-appellants. The starting point is that each self-represented co-party must file their own separate documents (r 25.7(2)). A co-party may instead sign and file an authorisation in Form 21 allowing another co-party (the authorised co-party) to file and serve documents on their behalf (r 25.7(3)). The authorisation stays in force until the party who gave it files a deauthorisation in Form 22 (r 25.7(4)), and while it is in force that party is bound by what the authorised co-party does in filing and serving documents (r 25.7(6)). Both the authorisation and any deauthorisation must be served on each other party as soon as practicable (r 25.7(5)).

When you need it

  • You and another party on the same side of a case, such as two co-respondents, are both self-represented and want one of you to handle filing and service.
  • You want documents in the case to be filed once for both of you rather than separately.
  • Not needed where a law firm acts for the co-parties; the firm files a notice of acting instead (r 25.2).

How to fill it in

  1. 1

    Complete the heading

    Delete all but the correct court (Supreme, District, Magistrates, ERD or Youth), add Court of Appeal, minor civil or the list if applicable, and name each party with capacity and party number, using the case number.

  2. 2

    Identify the authorised co-party

    In the panel, give the party title, full name, address for service (street, suburb, state, postcode, country), email and phone of the co-party you are authorising. Duplicate the panel if needed.

  3. 3

    Sign the authorisation

    The authorisation reads "[I/We] authorise the above named to file and serve documents on [my/our] behalf". Each authorising co-party signs, prints their name and dates it. For a company, add the office held by the signatory, such as director or secretary.

Filing, lodging and service

  • File the authorisation in the proceeding through CourtSA or at a registry.
  • Serve it on each other party as soon as practicable (r 25.7(5)). The form notes that parties must give an email address and documents will be served by email except where the rules require personal service.
  • To end the arrangement, file and serve a deauthorisation in Form 22 (r 25.7(4)-(5)). Until you do, the authorisation remains in force.

Common mistakes

  • You are bound by the authorised co-party's filing and service while the authorisation is in force (r 25.7(6)), so stay in touch and check what is filed in your name.
  • An authorisation covers filing and serving documents only. It does not let the co-party appear for you; a person generally cannot be represented by someone who is not a lawyer (r 25.6(1)).
  • Keep your own address for service up to date with a Form 25 if it changes (r 44.2).

Frequently Asked Questions

What does a Form 21 Authorisation do?

It lets a self-represented co-party file and serve documents in the case on your behalf, so you do not each have to file separate documents (r 25.7(2)-(3)).

How do I cancel an authorisation?

File a deauthorisation in Form 22 and serve it on each other party as soon as practicable (r 25.7(4)-(5)).

Can the authorised co-party speak for me in court?

No. The authorisation is limited to filing and serving documents. Rule 25.6 generally prevents representation by a person who is not a lawyer, subject to exceptions such as minor civil actions under section 38(4) of the Magistrates Court Act 1991.

Checked against the official sources on 26 October 2026

General information about the form, not legal advice about your matter. Rules and forms change: if anything here differs from the court or agency's current instructions, theirs apply.

Field map

3 boxes on the Authorisation (Form 21) fill from your matter. 1 is for you to complete: ticks, signatures and anything that needs judgement.

Client
Client full name(s)
Matter
Matter / file reference
Court
Court file number

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