Early part-payment in full settlement

The general rule is that part payment of a debt is not good consideration for a promise to forgo the balance: Pinnel's Case (1602) 5 Co Rep 117a, confirmed in Foakes v Beer (1884) 9 App Cas 605. A promise to accept less is therefore not binding merely because the debtor pays less than is due. There is, however, a well-established exception: payment before the due date at the creditor's request is good consideration. Here Northbank's email expressly requested payment by 30 June, two months before the contractual due date of 31 August. Kestrel complied. That early payment is consideration for Northbank's promise, and the arrangement is an accord and satisfaction. The fact that the sum was less than the debt does not defeat the exception. On authority, the credit controller's lack of actual authority is not necessarily fatal: a company may be bound by the ostensible authority of an employee who is held out as having authority to deal with the account. The internal €50,000 limit was not communicated to Kestrel. Northbank is therefore bound and cannot recover the €24,000 balance.

Yes. If Kestrel had paid on the due date, the early-payment exception in Pinnel's Case would not apply. Payment on the due date is merely performance of an existing obligation and is not good consideration for Northbank's promise to accept less. The general rule in Foakes v Beer would then prevent Kestrel from relying on the email as a binding compromise. Kestrel might instead argue promissory estoppel. That requires a clear promise, reliance, and inequitability. Kestrel could say it relied on the promise and did not pursue other ways of paying the balance. But promissory estoppel is typically suspensory rather than extinguishing, and it operates as a defence. It would not necessarily wipe out the debt forever. The stronger analysis is that the original agreement fails for want of consideration, and Northbank could recover the balance subject to any estoppel defence.

On the actual facts, promissory estoppel is a fallback rather than the primary route. Northbank made a clear and unequivocal promise: if Kestrel paid €60,000 by 30 June, Northbank would accept it in full settlement. Kestrel relied on that promise by paying early and by arranging its finances on the basis that the account was settled. Northbank marking the account 'settled' reinforces the reliance. It would be inequitable for Northbank to resile after receiving the benefit of early payment. Even if the early-payment exception were unavailable, estoppel would likely prevent Northbank from claiming the balance. The doctrine is often described as suspensory, but where the promise is to accept a lesser sum in full satisfaction and the debtor has relied, the practical effect may be permanent. The primary answer remains that early payment at the creditor's request supplies consideration, so estoppel is not strictly needed.