Evidence to Prove a Debt in Australian Tribunal | ClaimDone

# What Evidence Do You Need to Prove a Debt in an Australian Tribunal

If you are taking someone to an Australian tribunal over an unpaid debt, the tribunal will not take your word for it. You must prove the debt exists, the amount is correct, and the debtor has not paid.

This guide lists the core documents you need and shows you how to present them in a witness statement.

The three things you must prove

Every debt claim in an Australian tribunal requires you to establish:

• The debt exists — there was an agreement, contract, or legal obligation to pay
• The amount is correct — the sum claimed is accurate and verifiable
• The debt remains unpaid — the debtor has not paid, or has only partially paid

If you cannot prove all three, the tribunal may dismiss your claim or reduce the amount awarded.

Core documents you need

Most debt claims require at least three or four of these documents.

1. Invoice or tax invoice

An invoice is the primary evidence that you performed work, delivered goods, or provided a service, and that payment was due.

What it proves:

• The amount owed
• The date payment was due
• A description of the work or goods supplied
• Your ABN and business details (if applicable)

What to include:

• Invoice number
• Date of issue
• Itemised breakdown of charges
• Payment terms (e.g., “Due within 14 days”)
• GST breakdown if you are GST-registered

If you issued multiple invoices, include all of them. If the debtor paid some but not others, include both to show the pattern.

2. Contract or written agreement

A contract proves the terms under which the debt arose. It can be a formal signed document, a purchase order, an accepted quote, or an email exchange where terms were agreed.

What it proves:

• The parties agreed to the transaction
• The scope of work or goods supplied
• The price and payment terms
• Any conditions or obligations

What to include:

• The signed contract (if one exists)
• Any variations or amendments in writing
• Accepted quotes or proposals
• Purchase orders or work orders

If there was no formal contract, include any email, text message, or letter where the debtor agreed to pay for the work or goods.

3. Correspondence showing the debt was acknowledged or disputed

Emails, text messages, letters, and social media messages can prove the debtor knew about the debt, acknowledged it, or raised a dispute.

What it proves:

• The debtor received the invoice
• The debtor acknowledged the debt
• The debtor raised a specific dispute
• You attempted to resolve the matter before filing

What to include:

• Emails or letters chasing payment
• Text messages or WhatsApp exchanges
• Any response from the debtor, even if it was a promise to pay later
• Evidence you sent a letter of demand (if applicable)

If the debtor never responded, include evidence you sent the invoice and demand letter to the correct address or email. Proof of delivery can be useful.

4. Proof of work performed or goods delivered

If the debtor claims the work was not done or the goods were not delivered, you need evidence that contradicts that claim.

What it proves:

• You completed the work as agreed
• The goods were delivered to the debtor
• The quality met the standard required under the contract

What to include:

• Photos of the completed work
• Delivery dockets or consignment notes
• Signed acceptance forms or handover documents
• Timesheets or job logs (for service-based work)
• Before-and-after photos (for trades or construction work)

If the debtor claims the work was defective, include evidence that you offered to rectify the issue or that the defect was minor and did not justify non-payment.

5. Bank statements or payment records

Bank statements prove partial payments, dishonoured cheques, or failed direct debits. They also show the outstanding balance after any payments were credited.

What it proves:

• The debtor made some payments but stopped
• A cheque was dishonoured
• The outstanding balance after partial payment

What to include:

• Highlighted bank statements showing payments received
• Dishonoured cheque notices
• Payment receipts or remittance advices

6. Letter of demand or final demand

A letter of demand shows you gave the debtor a final chance to pay before filing with the tribunal. Some tribunals expect this.

What it proves:

• You attempted to resolve the matter without tribunal involvement
• The debtor was given a clear deadline to pay
• The debtor ignored or refused the demand

What to include:

• A copy of the letter of demand
• Proof it was sent (e.g., registered post receipt, email delivery confirmation)
• Any response from the debtor

How to present evidence in a witness statement

Australian tribunals do not want a pile of loose documents. They want a witness statement that explains your case in numbered paragraphs, with each paragraph referring to a specific piece of evidence.

A witness statement is a written account of the facts, sworn or affirmed to be true. It is the document you file with the tribunal when you lodge your application.

Structure of a witness statement for a debt claim

1. Introduction State your name, role, and relationship to the claim. For example:

• “My name is Sarah Chen. I am the director of Chen Electrical Pty Ltd, the applicant in this matter.”

2. Background Explain how the debt arose. For example:

• “On 15 March 2024, the respondent engaged my company to rewire a commercial premises at 22 High Street, Parramatta. The agreed price was $8,500 plus GST, payable within 14 days of completion.”

3. The work or goods supplied Describe what you did or delivered. Refer to supporting documents. For example:

• “I completed the rewiring work on 29 March 2024. A copy of the signed completion certificate is at Attachment A.”

4. The invoice State when you invoiced and what the terms were. For example:

• “I issued Tax Invoice No. 1024 on 30 March 2024 for $9,350 including GST. A copy is at Attachment B. Payment was due by 13 April 2024.”

5. Attempts to recover payment List what you did to chase the debt. For example:

• “On 20 April 2024, I emailed the respondent requesting payment. A copy of that email is at Attachment C. The respondent replied on 22 April 2024 saying he would pay ‘next week’. A copy of his reply is at Attachment D. No payment was received.”

6. Letter of demand If you sent one, state when and what response you received. For example:

• “On 10 May 2024, I sent a letter of demand by registered post giving the respondent 7 days to pay. A copy is at Attachment E. Australia Post tracking shows it was delivered on 13 May 2024. The respondent did not respond.”

7. Outstanding amount State the total owed and any interest or costs you are claiming. For example:

• “The outstanding amount is $9,350. No payment has been received. I am also claiming tribunal filing fees of $108.”

8. Conclusion State what you are asking the tribunal to do. For example:

• “I ask the tribunal to order the respondent to pay $9,458 comprising the debt of $9,350 and filing fees of $108.”

Attachments

Each document you refer to in the witness statement should be labelled as an attachment (Attachment A, Attachment B, etc.) and included in the order you mention them. Do not attach documents that are not mentioned in the statement.

Common mistakes to avoid

Submitting invoices without a witness statement The tribunal will not piece your case together for you. If you file invoices without explaining what they are for, the tribunal may reject your application.

Including irrelevant documents Only include documents that prove the debt exists, the amount is correct, or the debtor has not paid.

Forgetting to prove delivery If the debtor claims they never received the invoice or demand letter, you need proof it was sent to the correct address. Keep registered post receipts or email delivery confirmations.

Claiming interest without a contractual basis You cannot claim interest unless your contract or invoice stated interest would apply, or you are relying on a statutory right to interest. If you are unsure, do not claim it.

Overstating the claim Only claim what you can prove. If your invoice was for $5,000 but you can only prove $4,200 of work was completed, the tribunal will reduce your claim.

What happens at the tribunal hearing

The tribunal member will read your witness statement and attachments before the hearing. At the hearing, you may be asked to clarify parts of your evidence or respond to the debtor’s version of events.

If the debtor disputes the debt, the tribunal will weigh your evidence against theirs. If you have invoices, a signed contract, and proof of delivery, and the debtor has only vague denials, the tribunal will typically find in your favour.

If the debtor raises a genuine dispute—such as defective work or non-delivery—you will need to respond with evidence that the work met the required standard or that any defect was minor and did not justify non-payment.

The tribunal’s decision is legally binding. If you win, the debtor must pay. If they do not, you can enforce the order through the court system.

When to get legal advice

If your debt claim involves more than $10,000, or if the debtor has raised a complex defence such as misleading conduct, breach of warranty, or set-off, consider getting advice from a lawyer who practises in your state.

ClaimDone does not give legal advice. It generates legal-style documents based on the evidence you provide. For high-value or legally complex disputes, a qualified Australian lawyer can review your case and represent you at the hearing if needed.

How ClaimDone helps

ClaimDone prepares a tribunal-ready witness statement based on the evidence you upload. You complete a short intake form, upload your invoices, contract, and correspondence, and our Proprietary AI Engine drafts a structured witness statement with numbered paragraphs and labelled attachments.

The witness statement is formatted for the tribunal in your state, whether that is NCAT, VCAT, QCAT, or another tribunal. You receive a PDF ready to file, along with guidance on what to do next.

If you need to strengthen your evidence before filing, ClaimDone can also prepare a letter of demand to send first, giving the debtor one final chance to pay and creating a paper trail for the tribunal.

Ready to prepare your witness statement? Visit the ClaimDone witness statement service to get started. Upload your evidence, answer a few questions, and receive a tribunal-ready document in 24 hours.

Frequently Asked Questions

Do I need a lawyer to prove a debt in an Australian tribunal?

No. Australian tribunals are designed for self-representation. You do not need a lawyer if you have the right evidence—invoices, contract, correspondence, and a witness statement. ClaimDone prepares tribunal-ready witness statements based on the documents you upload.

What if I don't have a signed contract?

You can still prove a debt without a formal contract. Include emails, text messages, or letters where the debtor agreed to the work and price. Even informal agreements are enforceable if the terms are clear.

Can I claim interest on the debt?

Only if your contract or invoice stated that interest would apply, or if you are relying on a statutory right to interest. If you are unsure, do not claim interest—focus on recovering the principal amount.

What if the debtor claims they never received the invoice?

Include proof you sent it—email delivery confirmation, registered post receipt, or evidence it was sent to the correct address. If the debtor provided that address in the contract or correspondence, the tribunal will usually accept it was received.

How do I attach documents to my tribunal application?

Label each document as an attachment (Attachment A, Attachment B, etc.) in the order you mention them in your witness statement. Most tribunals accept PDF bundles uploaded online or printed and stapled together if filing in person.