Evidence Needed to Prove Breach of Contract in Tribunal

Australian tribunals decide on evidence, not emotion. They do not care about your frustration or what you thought the other party meant. They care about what you can prove on paper.

To win a breach of contract case at QCAT, NCAT, VCAT, SACAT, or any state tribunal, you need three things: proof the contract existed, proof it was breached, and proof of the loss you suffered.

The contract itself

The tribunal needs to see the actual agreement. If you have a signed written contract, bring multiple copies to the hearing.

What counts as a contract:

• Signed service agreement or contractor agreement
• Purchase order with terms accepted in writing
• Email chain where both parties agreed to specific terms
• Quote accepted in writing with clear scope and price
• Invoice that was paid, creating an implied contract for the work described
• Text messages where terms were agreed

If you do not have a signed document, you can still prove a contract existed. Australian contract law recognises verbal agreements and agreements formed by conduct. You need corroborating evidence — emails referring to the deal, payment records, delivery receipts, anything showing both parties acted as if a contract was in place.

What the tribunal looks for:

• Offer and acceptance — who proposed what, and who agreed
• Consideration — what each party promised (money for goods, payment for services)
• Intention to create legal relations — was this a casual favour or a binding deal?
• Certainty of terms — were the essential terms clear enough to enforce?

If your contract is vague, the tribunal may find it unenforceable.

Proof of breach

You must show the other party failed to do what they promised. This means proving they broke a specific term, not just that you are unhappy.

Non-payment for goods or services:

• Invoice showing amount due and payment terms
• Proof of delivery or completion (signed delivery docket, completion certificate, photos of finished work)
• Payment reminder emails or messages
• Bank statement showing no payment received

Defective goods or substandard work:

• Photos or video of the defect
• Expert report or tradesperson’s assessment (if the defect is technical)
• Correspondence where you notified the other party of the problem
• Original contract specifying the standard required

Failure to deliver goods or complete work:

• Contract stating the delivery date or completion deadline
• Evidence the deadline passed (calendar, dated communications)
• Messages where you followed up and they failed to deliver
• Any excuses they gave in writing

Breach of scope or specification:

• Contract or quote detailing what was agreed
• Evidence of what was actually delivered (photos, invoices, delivery notes)
• Written complaint to the other party
• Their response (or lack of response)

The tribunal will not accept “they did a bad job” without specifics. Show what was promised, what was delivered, and the gap between the two.

Communications and attempts to resolve

Tribunals expect you to try to resolve the dispute before filing. Your evidence must show you gave the other party a chance to fix the problem.

What to include:

• Initial complaint email or message
• Follow-up reminders
• Any response from the other party (even if dismissive or rude)
• Letter of demand or final notice
• Evidence they ignored your attempts (read receipts, delivery confirmations, no reply)

If you used Claim Done to send a letter of demand, include the PDF and the delivery receipt.

Tribunals are designed for disputes that could not be resolved by negotiation. If you filed without trying to talk it out, the tribunal may adjourn the matter and tell you to negotiate first. In some cases, they may award costs against you for wasting time.

Proof of loss

Proving breach is not enough. You must prove you suffered a financial loss and quantify it.

Direct loss:

• Money paid but not refunded (bank statements, receipts, invoices)
• Cost of fixing defective work (quotes from other contractors, invoices for repairs)
• Lost income (if you could not work because of the breach — payslips, tax returns, client contracts)

Consequential loss:

Some contracts allow you to claim for losses that flow from the breach — for example, if a builder’s delay meant you had to keep paying rent on your old place. Tribunals are typically cautious with consequential loss. You need clear evidence the loss was foreseeable and directly caused by the breach.

What the tribunal will not accept:

• Estimated or inflated figures without backup
• Emotional distress or inconvenience (not compensable in contract law)
• Loss that you could have avoided (you have a duty to mitigate)

Bring invoices, quotes, receipts, and bank statements. If you are claiming lost income, bring tax returns or profit and loss statements. If you are claiming repair costs, bring three quotes from licensed contractors.

Witness statements

If someone else saw the breach happen, or can verify your version of events, their evidence can strengthen your case.

Who makes a good witness:

• Someone who was present when the contract was agreed
• Someone who saw the defective work or goods
• An expert who can verify the standard was not met (electrician, engineer, accountant)
• A customer or client who was affected by the other party’s failure

What a witness statement must include:

• Full name and contact details
• Relationship to you (employee, subcontractor, customer, friend)
• What they personally saw, heard, or did
• Dates and locations
• A signed declaration that the statement is true

Do not ask a witness to exaggerate or speculate. Tribunals can spot coached evidence. The witness should state facts they personally know.

Organising your evidence bundle

Tribunals receive dozens of cases a week. Make it easy for the member to find what they need.

How to structure your bundle:

1. Cover sheet with case number, your name, and the hearing date
2. Index listing each document by tab number
3. The contract (tab 1)
4. Proof of breach (tabs 2-5, depending on volume)
5. Communications (tabs 6-10)
6. Proof of loss (tabs 11-15)
7. Witness statements (tabs 16 onwards)

Use physical tabs if you are filing in person. Use bookmarks if you are filing a PDF. Number every page.

What not to include:

• Irrelevant background (your business history, unrelated disputes)
• Duplicate documents
• Unsigned drafts
• Screenshots without context or date stamps

The tribunal will not read a 300-page bundle. They will skim it, find the key documents, and make a decision. If your evidence is buried in clutter, you lose.

Common evidence mistakes

Relying on verbal conversations:

If it is not in writing, it is hard to prove. Tribunals prefer contemporaneous written records over “he said, she said” testimony.

Submitting evidence late:

Most tribunals have strict deadlines for filing evidence. If you miss the deadline, the tribunal may refuse to admit your documents. Check the tribunal’s practice directions and file early.

No proof of service:

If you are relying on a notice, demand, or complaint, you must prove the other party received it. Use registered post, email with read receipts, or a process server.

Emotional language:

Your evidence should be factual and neutral. Do not call the other party a liar, a crook, or incompetent. Stick to what happened, when, and what it cost you.

How Claim Done helps

ClaimDone’s witness statement service generates a professionally formatted statement based on the evidence you upload. You complete a 5-minute intake, our Proprietary AI Engine reads your documents and drafts the statement in first person, and you review and sign it.

Designed for tribunal use across all Australian states. Flat fee, no subscription, done in 60 minutes.

Final checklist

Before you file, make sure you have:

• The contract (or evidence a contract existed)
• Proof the other party breached a specific term
• Communications showing you tried to resolve the dispute
• Invoices, receipts, and quotes proving your financial loss
• Witness statements from anyone who can corroborate your case
• An organised evidence bundle with an index

If you are missing any of these, the tribunal may dismiss your claim or reduce your award. Evidence wins cases. If you need a tribunal-ready witness statement prepared fast, start your Claim Done witness statement now.

Frequently Asked Questions

Can I prove a contract existed without a signed document?

Yes. Australian tribunals recognise verbal contracts and agreements formed by conduct. You will need corroborating evidence such as emails, text messages, payment records, or invoices showing both parties acted as if a contract was in place.

What if I do not have receipts for all my losses?

You can use bank statements, credit card statements, or statutory declarations to prove expenses. The tribunal will typically be more cautious with undocumented claims. Get quotes or invoices wherever possible.

Do I need a witness statement if I have written evidence?

Not always. If your documents clearly prove the breach and loss, a witness statement may not be necessary. But if there are disputed facts or the other party is likely to contradict your version, a witness statement strengthens your case.

How many documents should I include in my evidence bundle?

Only include documents that are directly relevant to proving the contract, the breach, and the loss. A well-organised 20-page bundle is better than a messy 200-page bundle. Tribunals do not have time to read everything.

What happens if I submit evidence late?

Most tribunals will refuse to admit late evidence unless you have a very good reason. Check the tribunal’s directions for filing deadlines and submit your evidence well before the hearing date.