How to Lodge a Proof of Debt in Australia Insolvency Online (form 535): Step-by-step, Deadlines & Evidence

When an Australian company enters liquidation or an individual is declared bankrupt, every creditor who wants a share of any available distribution must formally prove what they are owed. Understanding how to lodge a proof of debt in Australia insolvency online is therefore a non-negotiable skill for finance teams, trade creditors and secured lenders alike. The standard vehicle is Form 535, a prescribed form under the Corporations Act 2001 (Cth) for company insolvencies, while the Australian Financial Security Authority (AFSA) maintains its own online portal for personal bankruptcy matters.

This guide walks through the entire process: which form to use, what evidence to attach, how ABN obligations interact with your claim, the deadlines you must meet, and what to do if a liquidator or trustee rejects your proof of debt.

What Is a Proof of Debt and When Do You Use Form 535?

A proof of debt (PoD) is a formal written claim submitted by a creditor to an external administrator, a liquidator, voluntary administrator or bankruptcy trustee, to establish the existence, nature and quantum of a debt owed by the insolvent entity or individual. Without a valid PoD, a creditor has no standing to vote at meetings of creditors and no entitlement to receive a dividend from any distribution of assets.

In company insolvency, whether a creditors’ voluntary liquidation, a court-ordered winding up or a transition from voluntary administration, the prescribed form is Form 535, set out in Schedule 2 of the Corporations Regulations under the Corporations Act 2001 (Cth). The form requires the creditor to particularise the debt, declare any security held, and attach supporting evidence. ASIC’s published guidance for creditors in liquidation confirms that the liquidator will send a notice inviting proofs of debt, typically accompanied by a blank Form 535 or a link to download it.

In personal bankruptcy, creditors lodge their proof of debt with the Official Trustee or a registered trustee through the AFSA online portal, which uses its own form equivalent. The underlying statutory framework is the Bankruptcy Act 1966 (Cth). Despite the different legislative bases, the practical requirements, particularising the debt, attaching evidence, meeting a deadline, are substantially the same.

Who Can Lodge a Proof of Debt and What Counts as a Provable Debt?

Not every obligation gives rise to a provable debt. Understanding the threshold before you begin assembling your claim prevents wasted effort and avoids the embarrassment of a rejection.

A provable debt in a company liquidation is broadly any debt or claim that was owed by the company at the date the winding up began, or that arises from an obligation incurred before that date, including contingent and unliquidated claims. Penalties owed to government regulators and certain debts arising from illegal conduct may be excluded. In bankruptcy, the Bankruptcy Act 1966 (Cth) similarly defines provable debts and carves out specific exceptions such as certain penalty-based debts.

Secured Versus Unsecured Creditors

When to Include Interest and How to Calculate It

Creditors may claim interest that accrued on the debt up to the date of liquidation (or the date of the bankruptcy order). Interest accruing after that date is generally not provable unless all other debts are paid in full. To calculate the amount:

1. Identify the contractual or statutory interest rate applicable to the debt.
2. Determine the start date (usually the date the invoice became overdue or the date specified in the contract).
3. End the calculation at the “relation-back day”, the date of the winding-up order, or the date the voluntary liquidation resolution was passed.
4. Apply simple interest for each day outstanding: Principal × Rate ÷ 365 × Number of days.
5. Enter the resulting figure separately on Form 535 so the liquidator can verify it independently of the principal.

Evidence of Debt: What to Attach

The strength of your proof of debt depends on the quality of your supporting documentation. Attach the following where available:

• Tax invoices and statements of account. These are the primary evidence for trade debts and should show amounts, dates and payment terms.
• Contracts and written agreements. Include the executed agreement, any relevant variation or amendment, and schedules specifying payment obligations.
• Court judgments or orders. If the debt has been reduced to judgment, attach a sealed copy of the judgment.
• Bank statements or remittance records. Useful for proving partial payments already made, thereby narrowing the outstanding balance.
• Security documents. If you hold a registered security interest (e.g., under the PPSA), include the registration verification statement and the underlying security agreement.
• Correspondence. Demand letters, acknowledgements of debt from the debtor, or emails confirming amounts owed may corroborate the claim.
• Proof of authority. If the form is signed by someone other than the creditor (e.g., a solicitor or company secretary), include a letter of authority, power of attorney or board resolution.

How to Lodge a Proof of Debt in Australia Insolvency Online, Step-by-Step

This is the core procedural section. The exact method for lodging your proof of debt online depends on whether the insolvency is a company liquidation (Form 535 sent to the liquidator) or a personal bankruptcy (lodged via the AFSA portal). Both pathways are covered below.

Before You Start: Documents and Figures to Prepare

Gather the following before you open any form or portal:

1. The full legal name and ACN/ABN of the insolvent company (or the bankrupt individual’s details).
2. Your own entity details: full legal name, ABN (if applicable), ACN, registered address and contact details.
3. The total amount claimed, broken into principal, interest and any other components (e.g., costs).
4. All supporting evidence, saved as clearly labelled PDFs (e.g., Invoice_12345_CompanyName.pdf).
5. Details of any security interest held, including PPSA registration numbers.
6. The name and contact details of the liquidator, administrator or trustee, found on the notice to creditors or the ASIC Insolvency Notices page.

Pathway 1: AFSA Online Lodgement (Personal Bankruptcy)

For personal bankruptcy matters administered by the Official Trustee, AFSA provides an online lodgement system. The process is as follows:

1. Access the AFSA website. Navigate to the creditor services section of afsa.gov.au and locate the online proof-of-debt lodgement page.
2. Identify the bankruptcy. Enter the bankrupt person’s details or the administration number provided in the notice you received.
3. Complete the online form. Enter your creditor details, the amount claimed (separating principal and interest), and indicate whether you hold any security.
4. Upload supporting documents. Attach scanned copies of invoices, contracts and other evidence as PDF files. Use descriptive file names to assist the trustee’s review.
5. Verify and submit. Review all entries for accuracy. The system may require you to make a declaration that the information is true and correct. Submit the form electronically.
6. Save confirmation. Download or screenshot the submission confirmation and reference number for your records.

Pathway 2: Liquidator Portal or Email Submission (Company Liquidation)

In a company liquidation, the liquidator, not ASIC, is the recipient of proofs of debt. Many larger insolvency firms now operate dedicated online creditor portals. Where no portal is available, email or post remains standard.

1. Download Form 535. Obtain the Form 535 proof of debt PDF from the liquidator’s correspondence, or download it from the ASIC website. Some liquidators also supply an editable Word version of Form 535, ask the liquidator’s office if one is available.
2. Complete the form. Fill in every applicable field (see the field-by-field section below). Sign the form, electronic signatures are generally accepted, but confirm with the liquidator if they require a wet-ink signature or witnessed declaration.
3. Compile your evidence pack. Merge or clearly label all supporting documents. A single combined PDF with a contents page is best practice.
4. Submit via the liquidator’s portal or email. If a portal is available, follow the on-screen instructions to upload Form 535 and attachments. Otherwise, email the completed form and evidence to the address specified in the notice to creditors. Use a clear subject line: “Proof of Debt, [Your Company Name], [Insolvent Company Name and ACN]”.
5. Request acknowledgement. Ask the liquidator’s office to confirm receipt. If lodging by post, use registered mail and retain the tracking receipt.

Uploading Evidence: File Naming and Formatting Tips

• File format. PDF is universally accepted. Avoid image-only scans where possible, use OCR-readable PDFs so the liquidator can search the text.
• File naming. Use a consistent convention: CreditorName_DocumentType_Date.pdf (e.g., AcmeSupplies_Invoice4521_2025-09-15.pdf).
• File size. If using email, keep individual attachments under 10 MB. For larger packs, use a file-sharing link or split into clearly numbered parts.
• Cover sheet. Include a one-page summary listing every document attached, with page references. This speeds up the liquidator’s adjudication.

Ten Common Mistakes to Avoid When Lodging a Proof of Debt Online

1. Submitting Form 535 with the incorrect ACN or company name for the insolvent entity.
2. Failing to separate principal from interest, liquidators need to verify each component independently.
3. Omitting ABN or ACN details for the creditor (see the ABN rule section below).
4. Not declaring a security interest, which can invalidate your entire claim.
5. Attaching evidence in unsupported formats (e.g., .heic image files).
6. Missing the deadline specified in the liquidator’s notice.
7. Claiming interest beyond the relation-back day without statutory entitlement.
8. Lodging without a proper signature or authorisation.
9. Sending the PoD to the wrong recipient (e.g., ASIC instead of the appointed liquidator).
10. Failing to retain a copy of the submitted form and evidence pack for your own records.

How to Complete Proof of Debt Form 535, Field-by-Field

Form 535 is a structured document with specific fields that must be completed accurately. Below is a walkthrough of the key sections. If you need a Form 535 proof of debt PDF download, obtain it directly from the liquidator or from the ASIC regulatory resources page.

Key Fields Explained

• Creditor details. Full legal name (not trading name), registered address, ABN and/or ACN. If the creditor is an individual, provide the full name and residential address.
• Insolvent company details. The company’s exact registered name as it appears on ASIC records, together with its ACN.
• Amount of debt. State the total amount claimed, then break it down: principal sum, interest (specify rate and period), and any other amounts (e.g., contractual costs of recovery). Use Australian dollars.
• Consideration / how the debt arose. A concise narrative explaining the nature of the debt, for example: “Supply of building materials under Purchase Order #4521 dated 15 September 2025, payment terms 30 days net.”
• Security held. If you hold any security over the company’s assets (including a PPSA registration), describe it and provide an estimated value. If no security is held, mark the field accordingly.
• Vouchers / evidence. List every document attached. Use a numbered schedule for clarity.
• Verification / declaration. The person completing the form must sign a declaration that the information is true and correct to the best of their knowledge. In some circumstances, the liquidator may require the declaration to be made before a Justice of the Peace or Commissioner for Declarations.

Sample Completed Extract

Below is an illustrative extract showing how three critical fields might appear on a completed Form 535 for a trade supplier claim:

Deadlines, Notices and Timing: Liquidation Versus Bankruptcy

One of the most critical aspects of lodging a proof of debt in Australia insolvency online is meeting the deadline. Missing it can mean forfeiting your right to a distribution entirely, or at the very least delaying your entitlement until a subsequent (and potentially smaller) distribution round.

The liquidator or trustee sets the deadline by issuing a formal notice to creditors. ASIC’s guidance for creditors in liquidation indicates that the notice will specify a date by which proofs of debt must be lodged. Industry observers expect most liquidators to allow a minimum of 14 days, though the specific period depends on the circumstances and the statutory rules applicable to the type of insolvency.

Practical tip: Lodge your proof of debt as early as possible, do not wait for the deadline. Early lodgement gives the liquidator time to request clarification or additional evidence before the cut-off, reducing the risk of rejection.

ABN Rule and Privacy: When You Must, and Should Not, Include Your ABN

The Australian Business Number (ABN) is a key identifier for business creditors, but its inclusion on a proof of debt form raises both compliance and privacy considerations. The proof of debt requirements in Australia apply nationally, creditors in NSW, Victoria, Queensland and every other state and territory follow the same federal framework.

Under ATO rules, a supplier making a taxable supply must quote its ABN on invoices. Where no ABN is quoted, the payer may be required to withhold an amount from the payment at the top marginal tax rate under the PAYG withholding rules. In the insolvency context, this means:

• Business creditors (companies, partnerships, sole traders with an ABN) should include their ABN on Form 535. This allows the liquidator to verify the creditor’s identity, cross-reference ATO records, and ensures any dividend payment is processed without unnecessary PAYG withholding.
• Individual creditors without an ABN, such as a person owed money under a personal loan, are not required to have or quote an ABN. They should provide alternative identification (full name, address, date of birth) and may need to supply a Tax File Number declaration or exemption to avoid withholding on any dividend.
• Privacy considerations. If you are an individual creditor, be aware that your ABN (if you have one as a sole trader) is linked to public registers. You are entitled to ask the liquidator how your personal information will be stored and used, consistent with the Privacy Act 1988 (Cth).

Example scenario: A subcontractor (sole trader with ABN) lodges a proof of debt for unpaid invoices. The subcontractor should include their ABN on Form 535 to avoid the liquidator withholding tax from any future dividend at the no-ABN rate. Conversely, a family member who lent the bankrupt individual $20,000 without any business relationship would not have an ABN to include and should instead provide personal identification.

If Your Proof of Debt Is Rejected: Challenge, Review and Evidence Upgrades

A liquidator or trustee has the power to admit, reject or partially admit a proof of debt. If your claim is rejected, the likely practical effect is exclusion from the dividend, but you are not without recourse.

1. Request written reasons. The liquidator should provide a notice of rejection stating the grounds. Common grounds include insufficient evidence, a claim for a non-provable debt, mathematical errors, or a dispute about whether the debt exists.
2. Review the rejection against the evidence. Cross-check the liquidator’s reasons against your submitted documents. Identify any gaps, a missing invoice, an unsigned contract, or an incorrect interest calculation, that can be remedied.
3. Provide supplementary evidence. You may be permitted to lodge an amended or supplementary proof of debt with additional documents that address the liquidator’s concerns.
4. Apply to the court. Under the Corporations Act 2001 (Cth), a creditor who is dissatisfied with a liquidator’s decision to reject a proof of debt may apply to the court for a review of that decision. The court can confirm, vary or reverse the rejection. Time limits apply, seek legal advice promptly.
5. Negotiate. In some cases, the liquidator may be open to admitting the debt at a reduced amount (partial admission) if the creditor can agree on a figure supported by the available evidence.

Sample objection letter framework: Your letter to the liquidator should: (a) identify the rejected PoD by reference number and date; (b) address each ground of rejection specifically; (c) attach new or supplementary evidence; and (d) request re-adjudication within a stated timeframe. Maintain a professional, factual tone throughout.

Practical Resources: Templates, Checklists and Worked Examples

To assist creditors in preparing a complete and accurate submission, the following resources are recommended:

• Form 535 PDF. Download the current version from the liquidator’s correspondence or the ASIC insolvency resources page. Some liquidators also provide an editable Word version of Form 535 upon request.
• Evidence checklist. Use the checklist in the “Evidence of debt” section above to verify you have assembled every relevant document before submission.
• Interest calculation formula. Principal × Annual interest rate ÷ 365 × Number of days from the date interest began accruing to the relation-back day. Use a spreadsheet to automate this for multiple invoices.
• Sample objection letter. A template addressing common rejection grounds is available as part of our supporting resource on challenging rejected proofs of debt.
• AFSA online lodgement portal. Access the portal directly at afsa.gov.au for personal bankruptcy proof-of-debt submissions.

Conclusion

Lodging a proof of debt is one of the most consequential steps a creditor takes in any Australian insolvency. Whether you are completing Form 535 for a company liquidation under the Corporations Act or using the AFSA online portal for a personal bankruptcy, the process rewards preparation and precision. Gather your evidence early, calculate interest accurately to the relation-back day, include your ABN where required, and submit well before the deadline. If your claim is rejected, act quickly, request reasons, supplement your evidence, and seek a court review if necessary. Understanding how to lodge a proof of debt in Australia insolvency online, and doing it correctly the first time, protects your position and maximises your prospect of recovering what you are owed.

Sources

1. Australian Financial Security Authority (AFSA)
2. Australian Securities & Investments Commission (ASIC), Liquidation: A Guide for Creditors
3. Federal Register of Legislation, Corporations Act 2001 (Cth)
4. Federal Register of Legislation, Bankruptcy Act 1966 (Cth)
5. Australian Taxation Office (ATO)
6. Australasian Legal Information Institute (AustLII)
7. Law Council of Australia