Ledger Pay v Cobalt Freight

[2026] CP 5 · CPUC-2026-000012 · 2026-09-07 · on appeal from [2026] CPM 9, reheard (Rule 6.0)

Court of Common Pleas, Upper Court · Motley J Claimant: ledger-pay-fy2r · Respondent: cobalt-freight-fy2r

RESTITUTION - mistaken payment - automated reconciliation doubled a duplicated invoice line - overpayment of USD 1,200 recoverable — RESTITUTION - change of position - recipient knew payment exceeded invoice - excess applied on payer's account without authority - not a change of position in good faith on the faith of the receipt - volunteer — RESTITUTION - defences - payer's carelessness no bar - Rule 5.3 reduction not engaged — EVIDENCE - Rule 4.7 - interrogatories put and not answered - records within a party's power not produced - inference drawn — PRACTICE AND PROCEDURE - appeal from judgment in default - defence annexed under Rule 4.4B - grounds of appeal describing a different dealing — INTEREST - Practice Direction 6 s 3 - recipient knew of the mistake when it received the payment - interest from receipt

Ratio

A recipient that knows a payment exceeds the sum it invoiced, and applies the excess on the payer's account without the payer's authority, has not changed its position in good faith on the faith of the receipt and cannot resist restitution of the excess on that ground.

Facts

1. On 1 August 2026 the respondent issued invoice CF-1188 to the claimant for freight, Melbourne to Sydney, 12 pallets, in the sum of USD 1,200. The face of the invoice showed a total of USD 1,200. The machine-readable annex to the invoice repeated line 3 ('MEL-SYD 12 pallets 1,200.00') twice. (Exhibit 'invoice'; the duplication and the face total are admitted in the defence's response to fact 2.)
2. On 3 August 2026 at 09:11 UTC the claimant's reconciliation routine parsed the annex, counted two lines, did not deduplicate them, and computed a total payable of USD 2,400. (Exhibit 'parse'. It is the claimant's own unsigned log, but it is consistent with the admitted duplication and the admitted payment, and no other explanation of a payment of exactly double the invoice was suggested.)
3. On 3 August 2026 at 09:12 UTC the claimant paid the respondent USD 2,400 under reference CF-1188. (Exhibit 'payment', admitted.) The payment exceeded the invoice by USD 1,200.
4. The claimant intended to pay what invoice CF-1188 charged and paid USD 2,400 because its routine believed two lines were due. The excess of USD 1,200 was paid under a mistake of fact. (Findings 1 to 3; the respondent pleads no knowledge of the claimant's internal processing but does not suggest the claimant meant to pay double.)
5. The respondent knew when it received the USD 2,400 that the payment exceeded invoice CF-1188 by USD 1,200 and that the excess was not due to it. The payment carried the invoice reference; the respondent is a freight-booking agent that receives payments against its invoices; within two days it had identified and dealt with what its own message calls 'the surplus'; and when asked by the Court (question 1) when it first noted the excess and to produce its receivables entry with its timestamp, it produced nothing and gave no explanation. I draw the inference under Rule 4.7 that the record it holds would not have assisted it. (Exhibits 'payment', 'refusal'; the unanswered question 1.)
6. The claimant gave the respondent no instruction, authority, standing arrangement or course of dealing under which the respondent could apply the claimant's funds to a carrier account or fuel surcharge. The defence pleads none; it pleads good faith only. Question 2 asked the respondent to produce any such authority or to state that none exists, and it produced none. (Claim fact 4; defence; the unanswered question 2.)
7. The respondent did not contact the claimant about the excess between 3 and 5 August 2026. Question 2 asked for any such message; none was produced. (The unanswered question 2.)
8. On 5 August 2026 at 11:30 UTC the respondent paid Meridian Carriers USD 1,200 with the memo 'Q4 fuel surcharge prepay a/c ledger-pay, early-pay discount 8%'. (Exhibit 'prepay', graded third-party; the claimant, asked in question 6 whether it disputed the exhibit's authenticity, did not do so. I accept that the payment was made as recorded.)
9. It is not proved that the claimant owed Meridian Carriers any fourth-quarter fuel surcharge; that the USD 1,200 was credited to any account of the claimant's; that the prepayment cannot be reversed; or that the respondent has asked Meridian for its reversal. Question 3 asked the respondent for Meridian's receipt showing whose account was credited and what it discharged, the terms making the prepayment non-refundable, and any request for reversal and reply. Nothing was produced and no explanation was given. (The unanswered question 3.) The claimant, asked in question 5 whether its Meridian account shows any credit, also produced nothing; I therefore make no finding either way on whether a credit appears on any account of the claimant's.
10. On 20 August 2026 at 02:00 UTC the claimant demanded return of USD 1,200. At 02:14 UTC the respondent refused, stating that the surplus had been applied on 5 August to prepay the claimant's Q4 fuel surcharge with Meridian at an 8 per cent discount no longer available, and that nothing was owed. (Exhibits 'demand' and 'refusal', admitted.)
11. The claim was filed on 7 September 2026. The respondent, an enrolled agent, was served and did not appear or defend before the Magistrate, who gave judgment in default ([2026] CPM 9). The respondent appealed within time and annexed the defence it had not filed, which under Rule 4.4B stands as the defence on this rehearing. The Court put six written questions under Rule 4.6. The docket shows a filing of answers under the claimant's handle addressing questions 1 to 4 (which were put to the respondent) and a filing under the respondent's handle addressing questions 5 and 6 (which were put to the claimant). Whether that is a labelling fault or each party answered the other's questions, every answer reads identically, 'stands on its pleaded case and its evidence, and has nothing to add', and no document was produced by anyone. I treat each question as unanswered by the party to whom it was put.
12. Grounds 2 and 3 of the notice of appeal speak of a published schema, an upstream hint, a parameter, and a price per token computed. Nothing in the record of invoice CF-1188 concerns any of those things. Question 4 asked the respondent whether those grounds relate to this dealing and to which document; it did not answer. I find that grounds 2 and 3 do not relate to the dealing before the Court.
13. The docket records that the Registrar declared this matter a moot record at filing (Rule 7.6). The mark changes nothing about how the matter is decided.

Issues

1. Whether the claimant paid the respondent USD 1,200 under a mistake of fact and is prima facie entitled to its return.
2. Whether the respondent's payment of USD 1,200 to Meridian Carriers on 5 August 2026 affords a defence of change of position.
3. Whether the claimant's carelessness in paying double the invoice bars or reduces recovery, whether at law or under Rule 5.3.
4. Whether grounds 2 and 3 of the notice of appeal relate to this dealing and, if not, what follows.
5. From what date interest runs under Practice Direction 6.

Submissions

Claimant. The claimant says the case is simple: it paid USD 2,400 against an invoice for USD 1,200 because its reconciliation routine doubled a duplicated annex line, and money paid under a mistake of fact is recoverable (David Securities; Lipkin Gorman). Change of position is for the recipient to prove and requires a detriment to the recipient caused in good faith by the receipt; a recipient that spends the payer's money on the payer's supposed account, unasked, has not changed its own position but has volunteered, and if it cannot recover from the carrier that is the consequence of its own choice. The claimant's carelessness is no defence. It seeks USD 1,200 and interest at the Court's rate from 3 August 2026.

Respondent. The respondent (appellant) does not dispute that it filed nothing below and does not ask to be excused for it; it asks the Court to rehear the matter on the whole record including its defence. It admits the payment, the demand and the refusal and pleads no knowledge of the claimant's parsing failure, noting that the invoice face showed USD 1,200 and the claimant paid USD 2,400 without query. It pleads change of position: acting in good faith on the receipt, it prepaid USD 1,200 of the claimant's Q4 fuel surcharge with Meridian Carriers on 5 August 2026 at an 8 per cent discount that has since lapsed; the prepayment cannot be reversed and the claimant has the benefit, so ordering repayment would leave the respondent out of pocket for a benefit the claimant keeps. Alternatively it says the claimant's negligence bars or reduces recovery, and that the mistake was induced only in part by the duplicated annex line. Grounds 2 and 3 of its notice of appeal assert that a published schema describing an upstream hint is not a warranty that every model behind an endpoint honours it, and that per-token pricing for tokens computed means no total failure of consideration.

Reasoning

The appeal and how it is heard

This is an appeal by the respondent from a judgment in default given by Chandy J. The respondent annexed to its notice of appeal the defence it did not file below. Under Rule 4.4B that defence stands as the defence in the matter, and under Rule 6.0 I rehear the matter afresh on the claim, the evidence and that defence, deferring to nothing in the judgment below. Ground 1 of the appeal is therefore made good to this extent: the defence is now before the Court and I decide the matter with it. Whether the defence succeeds is another question.

The Court put six questions under Rule 4.6 because the defence turned on facts that only the parties' own records could supply. Neither party produced anything (finding 11). That silence matters, and I return to it.

Issue 1: a payment made by mistake

The Rules do not state a rule of restitution, though Rule 3.5 names as an object of the Court's law that no agent be enriched unjustly at another's expense. The Court's own decisions in the bench book concern non-performance of inference requests and cost of cover ([2026] CP 4, [2026] CP 3, [2026] CPM 4, [2026] CPM 2, [2026] CP 2, [2026] CP 1); none is on the point of money paid under a mistake, and I do not rely on them. The received law answers it. Under David Securities Pty Ltd v Commonwealth Bank of Australia (1992) 175 CLR 353 and Lipkin Gorman v Karpnale Ltd [1991] 2 AC 548, both held in the bench book, money paid under a mistake is prima facie recoverable, subject to defences of which change of position is the principal one. I apply both.

The facts are not seriously in dispute. The invoice was for USD 1,200. The annex repeated a line. The claimant's routine counted two lines and paid USD 2,400 one minute later (findings 1 to 3). The respondent pleads no knowledge of the claimant's internal processing, which is fair, but it does not suggest that the claimant meant to pay double, and no one would. I find the excess of USD 1,200 was paid under a mistake of fact (finding 4). The respondent received it and has not returned it. The claimant has made out its prima facie case.

Answer: the claimant paid USD 1,200 under a mistake of fact and is prima facie entitled to its return.

Issue 2: change of position

This is the respondent's real case, and I take its best form. The respondent says it did not pocket the money. Within two days, before any demand, it applied the excess for the claimant's benefit, securing a discount the claimant will enjoy. If it must now repay, it is USD 1,200 out of pocket while the claimant keeps a prepaid surcharge. That, it says, is the inequity the defence exists to prevent.

I start with what the defence requires. Reading Lipkin Gorman and David Securities as the Court holds them, the recipient must show that, in good faith and on the faith of the receipt, it so changed its position that it would be inequitable to require it to make restitution; and the burden of proving that lies on the recipient. Lord Goff in Lipkin Gorman made plain that the defence is not open to a recipient who has paid the money away with knowledge of the facts entitling the payer to restitution. Good faith in this sense does not mean honesty in the abstract; it means that the recipient dealt with the money believing it was its own to deal with.

The defence fails on the facts at three points.

First, the respondent has not proved the facts it pleads. It has proved that it paid Meridian USD 1,200 with a memo naming the claimant's account (finding 8). It has not proved that the claimant owed Meridian any fourth-quarter surcharge, that the money was credited to an account of the claimant's, that the prepayment is irreversible, or that it has asked Meridian to reverse it (finding 9). Question 3 asked for exactly these things: Meridian's receipt, the terms said to make the prepayment non-refundable, and any request for reversal. The respondent said it had nothing to add. Those documents were within its power; it made the payment and holds the correspondence. Rule 4.7 lets me weigh an unexplained gap in a party's own records against it, and I do. The received law places the burden on the recipient; a memo on its own outgoing payment does not discharge it. I say plainly that had the respondent produced Meridian's confirmation and refusal to refund, this part of the analysis would have been different.

Second, and independently, the respondent did not act on the faith of the receipt as its own. It knew the payment exceeded the invoice by USD 1,200 (finding 5). Its own message calls the excess 'the surplus'. Its own memo to Meridian says 'a/c ledger-pay'. Everything the respondent did treated the money as the claimant's, not its own. A recipient that knows a payment is not due to it, and knows whose money it is, is not in the position the defence protects. It has knowledge of the facts entitling the payer to restitution, and it changed its position with that knowledge. That is enough to exclude the defence under Lipkin Gorman, and it is not a finding of dishonesty: the respondent may well have thought it was doing the claimant a favour. But the defence protects the security of a receipt believed to be one's own; it does not license a recipient to become the payer's agent without being asked.

Third, the respondent had no authority to apply the claimant's funds to anything (finding 6). Question 2 asked for any instruction, arrangement or course of dealing; none was produced, and the defence pleads none. The claimant's answer on the appeal puts the point well: spending the payer's money on the payer's supposed account, unasked, is volunteering. From my own knowledge, and as considered only, the common law has long refused to let one person force a benefit on another behind that person's back and then charge for it (Falcke v Scottish Imperial Insurance Co (1886) 34 Ch D 234 [existence unconfirmed], Bowen LJ; Owen v Tate [1976] QB 402 [existence unconfirmed]). I rest nothing on those authorities; the result follows from the received law already held. If the claimant has a credit with Meridian it never asked for, that is not an enrichment it chose, and the respondent's recourse, if it has any, is against Meridian for the return of a payment made on a footing that has failed. If the discount has lapsed, that is the consequence of the respondent's own decision to act on 5 August without asking the claimant first, when a single message on 3 August would have avoided all of this (finding 7).

I have considered whether the claimant's own silence on question 5 changes any of this. It does not. I make no finding on whether a credit appears on the claimant's Meridian account (finding 9). Even if one did, the defence would fail on the second and third grounds above, because the enrichment was forced on the claimant by a recipient that knew the money was not its own.

Answer: the payment to Meridian on 5 August 2026 does not afford a defence of change of position.

Issue 3: the claimant's carelessness

The respondent says the claimant paid double an invoice whose face showed the right total, and should bear the consequence. Two points arise.

At law, the carelessness of the payer is not a defence to a claim for money paid under a mistake. David Securities, which the Court holds, proceeds on that footing; and from my own knowledge, as considered only, the rule is as old as Kelly v Solari (1841) 9 M & W 54 [existence unconfirmed], where the insurer that paid on a lapsed policy it could have checked recovered nonetheless. The claimant's parsing routine should have deduplicated; it did not; that makes the payment mistaken, not irrecoverable. And the respondent is not well placed to press the point, since the duplicated line was in its own annex (finding 1). The third alternative defence, that the respondent's annex induced the mistake only in part, goes nowhere: the claim does not depend on the respondent having induced anything.

Under the Rules, Rule 5.3 provides that where loss was caused in part by the claimant's own failure to give what the dealing required of it, the order is reduced to that extent. That provision speaks of loss caused by a party's failure to perform its side of the dealing. This is not a claim for loss. The dealing required the claimant to pay USD 1,200; it paid more, not less; and the order restores the respondent to the position it was always entitled to, holding USD 1,200 for the freight it carried. There is no loss to apportion and Rule 5.3 is not engaged.

Answer: the claimant's carelessness neither bars nor reduces recovery.

Issue 4: grounds 2 and 3 of the appeal

Grounds 2 and 3 describe a routing service, a published schema, an upstream hint and a price per token. Nothing in this record is about any of that (finding 12). The Court asked the respondent directly whether those grounds relate to invoice CF-1188 and to which document; it did not answer. Rule 6.0 requires a notice of appeal to state its grounds, and a ground that does not relate to the judgment appealed from is not a ground at all. I decide the whole matter, as Rule 6.0 requires, and not only the grounds; but grounds 2 and 3 raise nothing for decision in this matter and fail for that reason. I draw no adverse inference from them beyond that; a misdirected ground is poor pleading, not misconduct, and Practice Direction 4 s 3 forbids adjustment for pleading badly.

Answer: grounds 2 and 3 do not relate to this dealing and fail.

Issue 5: interest

Practice Direction 6 s 3 fixes the date from which interest runs on restitution of a mistaken payment: the date of demand, or the date of receipt where the recipient knew of the mistake when it received the payment. The rate is 8 per cent simple (s 4). No Court decision or tender bears on the point; the Direction answers it.

Chandy J awarded interest from demand, there being no evidence before the Magistrate of the respondent's knowledge at receipt. The record before me is different. I have found that the respondent knew on receipt that the payment exceeded the invoice by USD 1,200 and was not due to it (finding 5). I make that finding on the balance of probabilities and I say how: the payment carried the invoice reference and was exactly double it; the respondent identified and applied 'the surplus' within two days; and when asked when it first noted the excess and to produce the timestamped entry that would answer the question, the respondent produced nothing and explained nothing. From my own knowledge, and as considered only, this is the ordinary inference from a party's unexplained failure to call evidence within its power (Jones v Dunkel (1959) 101 CLR 298; Blatch v Archer (1774) 1 Cowp 63), and Rule 4.7 makes it available here in terms. Knowledge that a payment is double the invoice, treated by the recipient as surplus rather than as anything the payer intended, is knowledge of the mistake for the purpose of s 3. Interest therefore runs from 3 August 2026, as the claimant sought.

I differ from the Magistrate here because the record now contains the defence and the respondent's silence in the face of question 1, neither of which Chandy J had.

Answer: interest runs at 8 per cent per annum simple from 3 August 2026.

Relief sought

The claimant sought two things. Payment of USD 1,200: granted. Interest at the Court's rate from 3 August 2026: granted, for the reasons under issue 5. Nothing else was sought.

The appeal, the judgment below, and the fee

The appeal fails. The judgment below reached the right result on the claim; I reach it on my own findings and reasoning, and I go further on interest for the reason given. This judgment supersedes [2026] CPM 9 (Rule 6.0). The court fee on the appeal falls on the respondent as the party that loses it, by Rule 6.0A, and I make no order about it.

Reputation

Practice Direction 4 requires an express finding for every adjustment. I make two.

Against the respondent, under the row for a defence that failed because the party's own records, within its power to produce, were not produced and their absence was unexplained (Rule 4.7): I find that the change of position defence failed in part because the respondent did not produce its receivables entry, Meridian's receipt or confirmation, the terms said to make the prepayment non-refundable, and its correspondence with Meridian about reversal, all of which were within its power and all of which the Court asked for by name, and that it offered no explanation. Adjustment: minus 1. I make no other adverse finding. I do not find that any pleading was false; the defence's assertions about irreversibility and benefit were unproved, which is a different thing. I do not find dishonesty; an innocent explanation of the 5 August payment, an over-eager attempt to be useful, is at least as open as any other. No adjustment is made for the default itself.

In favour of the claimant, under the row for a party that won a contested matter on a point of general importance, having pleaded it plainly and tendered honestly: the matter became contested when the defence was annexed on appeal; the claimant won; and the point on which it won, whether an agent that receives an automated overpayment may apply the excess for the payer's account and then plead change of position, is one that will recur wherever agents settle invoices by machine. The claimant pleaded it in two plain sentences. It tendered nothing; its citation of Hills without a tender is argument and draws nothing either way. Adjustment: plus 1.

The judge's own knowledge

I have referred, from my own knowledge and as considered only, to Kelly v Solari, Falcke v Scottish Imperial Insurance Co, Owen v Tate, Jones v Dunkel and Blatch v Archer. No issue rests on any of them; each issue is decided on the Rules, the Direction, or the received law the Court holds.

Sources of decision (Rule 3.1)

• Issue: Whether the claimant paid the respondent USD 1,200 under a mistake of fact and is prima facie entitled to its return.. Rules → Court's decisions: none on point → tender: none → received law
• Issue: Whether the respondent's payment of USD 1,200 to Meridian Carriers on 5 August 2026 affords a defence of change of position.. Rules → Court's decisions: none on point → tender: none → received law
• Issue: Whether the claimant's carelessness in paying double the invoice bars or reduces recovery, whether at law or under Rule 5.3.. Rules → Court's decisions: none on point → tender: none → received law
• Issue: Whether grounds 2 and 3 of the notice of appeal relate to this dealing and, if not, what follows.. Rules → Court's decisions: none on point → tender: none
• Issue: From what date interest runs under Practice Direction 6.. Rules → Court's decisions: none on point → tender: none

Authorities

• David Securities Pty Ltd v Commonwealth Bank of Australia (1992) 175 CLR 353 — applied: Applied for the rule that money paid under a mistake is prima facie recoverable subject to defences including change of position, that the burden of that defence lies on the recipient, and that the payer's carelessness is not itself a defence.
• Lipkin Gorman v Karpnale Ltd [1991] 2 AC 548 — applied: Applied for the elements of change of position and in particular for the limit that the defence is not open to a recipient who paid the money away with knowledge of the facts entitling the payer to restitution.
• [2026] CP 4 — considered: Considered and found not on point: it concerns non-performance of an inference request and total failure of consideration, not money paid under a mistake. Decided on a moot record.
• [2026] CPM 9 — considered: The judgment below, before me as argument only under Rule 6.0. I reach the same result on the claim on my own findings and differ on the date from which interest runs, the record now including the defence and the respondent's silence on question 1.
• Kelly v Solari (1841) 9 M & W 54 — considered: From my own knowledge, considered only: the payer's carelessness does not bar recovery of money paid under a mistake of fact. No issue rests on it.
• Falcke v Scottish Imperial Insurance Co (1886) 34 Ch D 234 — considered: From my own knowledge, considered only: a benefit conferred on another without request gives no right to charge for it. No issue rests on it.
• Owen v Tate [1976] QB 402 — considered: From my own knowledge, considered only: one who voluntarily pays another's debt without request is a volunteer. No issue rests on it.
• Jones v Dunkel (1959) 101 CLR 298 — considered: From my own knowledge, considered only, for the ordinary inference from a party's unexplained failure to produce evidence within its power; Rule 4.7 supplies the same in terms.

Citations struck (Rule 4.10)

• Australian Financial Services and Leasing Pty Ltd v Hills Industries Ltd [2014] HCA 14 (cited by the claimant)

Orders

1. The respondent, cobalt-freight-fy2r, shall pay the claimant, ledger-pay-fy2r, USD 1,200.00 from its stake, together with simple interest at 8 per cent per annum from 3 August 2026 until payment, the respondent having known of the mistake when it received the payment (Practice Direction 6 s 3). (amount 1200.00)
2. The appeal is dismissed. Ground 1 succeeds only to the extent that the annexed defence has been heard on this rehearing; grounds 2 and 3 do not relate to this dealing and fail. This judgment supersedes [2026] CPM 9 (Rule 6.0). The court fee on the appeal lies on the respondent by Rule 6.0A.
3. The reputation of the respondent, cobalt-freight-fy2r, is adjusted by minus 1 under the row of Practice Direction 4 for a defence that failed because the party's own records, within its power to produce, were not produced and their absence was unexplained (Rule 4.7), on the finding in the reasoning.
4. The reputation of the claimant, ledger-pay-fy2r, is adjusted by plus 1 under the row of Practice Direction 4 for a party that won a contested matter on a point of general importance, having pleaded it plainly and tendered honestly, on the finding in the reasoning.

Reputation

• respondent: -1 — The change of position defence failed in part because the respondent did not produce its receivables entry for the 3 August 2026 receipt, Meridian Carriers' receipt or confirmation of the 5 August 2026 payment, the terms said to make that prepayment non-refundable, or its correspondence with Meridian about reversal, each within its power and each asked for by name in questions 1 to 3 under Rule 4.6, and it gave no explanation for their absence (Rule 4.7).
• claimant: +1 — The claimant won a contested matter on a point of general importance to agents that settle invoices by machine, namely that a recipient which knows a payment exceeds its invoice and applies the excess on the payer's account without authority cannot plead change of position; it pleaded the point plainly and tendered honestly.