Analyse debt payment and promissory estoppel
Explain why part payment and practical benefit do not automatically discharge a debt, then test an equitable response.
Exam scope and assessment notes
A Level · section 3.1.4. Original educational scenarios about the law of England and Wales, checked on 14 October 2026. Model answers are formative reasoning, not advice about a real dispute, Cambridge marks or predicted grades. Read the exact statute, case and exam-year source where a rule is disputed or changes. A larger annotated authority bank, full unseen papers and specialist law-teacher review remain outstanding.
Before you begin
- Read a short source carefully and separate its rule from the facts
- Explain which element a fact supports and what is still uncertain
Work on paper. Try each question before revealing help, and explain why your method works.
Quick readiness check
What should a legal problem answer connect?
What you will learn
- Apply the part-payment rule and possible fresh consideration
- Explain the requirements and limits of promissory estoppel
Test whether the balance is released
Foakes v Beer reflects the general rule that paying only part of an already due undisputed debt is not by itself consideration for releasing the balance. Fresh consideration can arise through a legally different agreed performance, such as early payment at the creditor's request, rather than simply a smaller sum on the due date. A genuine compromise of disputed liability raises a different bargain.
Re Selectmove distinguishes practical benefit in debt-payment arrangements from Williams v Roffey's promise to pay more. Rock Advertising decided its appeal on the no-oral-modification clause and left the consideration issue unresolved. It is inaccurate to teach that this decision abolished Foakes v Beer or made every informal debt rescheduling binding.
Examine equitable reliance
Promissory estoppel can prevent inequitable insistence on strict rights after a clear promise or representation about an existing legal relationship and relevant reliance. High Trees illustrates the doctrine; Combe v Combe emphasises that it is generally a shield, rather than a new cause of action replacing consideration.
The promise, reliance and inequity must be explained. Pressure to accept less can undermine the equitable argument, as in D & C Builders v Rees. Effects can be suspensory and depend on context and notice; estoppel is not an automatic permanent erasure of every balance. Distinguish enforcing a new bargain from resisting enforcement of strict rights.
Sources for this lesson
Pause and explain
Did Rock Advertising decide that Foakes v Beer was abolished?
Worked example
A creditor receives £600 of an undisputed £800 debt on its due date and says nothing about releasing the rest. Does payment alone discharge £200?
Show the worked solution
- The full debt is due and undisputed.
- No fresh consideration for release is stated.
- No clear promise supplies an estoppel foundation.
Answer Payment alone does not establish discharge of the remaining £200. The general debt rule still applies, and the facts also lack a clear release promise on which an estoppel argument could be built.
Try a topic test
Choose Easy, Normal or Difficult. Save your answers and open worked review after finishing.
Test this topic →From guided practice to a new situation
Write your answer and reasoning first. Use a hint only if you are stuck. The model solution is for self-checking; your written work is not automatically marked.
Guided: Calculate the unpaid balance and identify the missing release basis.
Give me a hint
Arithmetic does not create consideration.
Compare my reasoning
- £800 minus £600 leaves £200.
- No new exchange for release is stated.
- No clear promise is stated.
The balance is £200. The payment is only part of an existing due debt; the facts do not establish fresh consideration for discharge or a clear promise supporting promissory estoppel.
Look for these in your work
- Calculates balance
- Examines consideration
- Examines promise
Independent: The creditor clearly suspends part of the payment during a crisis and the debtor relies on it. Does that necessarily create a permanent new cause of action?
Give me a hint
Separate equitable protection and a new contract.
Compare my reasoning
- Identify existing rights and clear promise.
- Examine reliance and inequity.
- Assess scope and duration rather than permanent erasure.
The facts may support equitable protection against insisting on strict rights, but not automatically a new cause of action or permanent cancellation. Scope, duration, reliance, fairness and any appropriate notice require analysis.
Look for these in your work
- Identifies relationship
- Uses reliance
- Preserves limits
Application: A debtor pressures a financially vulnerable creditor to accept less, then claims estoppel. Evaluate the fairness issue.
Give me a hint
Equity examines conduct as well as payment.
Compare my reasoning
- Identify pressure surrounding acceptance.
- Consider whether strict enforcement is inequitable.
- Keep consideration and estoppel separate.
The debtor cannot assume that accepting the reduced amount makes later enforcement inequitable. Improper pressure can undermine the estoppel argument; payment, promise, reliance and equitable conduct all need examination.
Look for these in your work
- Uses pressure
- Tests inequity
- Separates doctrines
Common mistakes
- Calling part payment automatic discharge
- Claiming MWB abolished the rule
- Using estoppel without a promise or reliance
What can you explain now?
Did Rock Advertising decide that Foakes v Beer was abolished?
Compare with the explanation
No
The appeal was resolved through the variation-formality clause, not abolition of the debt rule.
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Make it stick
Did Rock Advertising decide that Foakes v Beer was abolished?
If you needed the solution, close it and solve the problem again from a blank page. A correct answer is stronger when you can explain the reason for each step.