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Consumer and service disputes guides · 6 min read

Evidence of verbal promises by a salesperson

A salesperson's spoken promise can be relevant to what was agreed, even when it is absent from the invoice.

Jurisdiction: England and Wales.

A salesperson's spoken promise can be relevant to what was agreed, even when it is absent from the invoice. Consumer contracts can be made orally, in writing or through conduct; proving the particular promise is a separate task. [1]

Reconstruct the words and their context Write a dated note identifying who spoke, where the conversation happened and the words you remember. Distinguish a direct quotation from your best recollection. Include the question that prompted the answer and anyone who heard it.

Save follow-up messages referring to the assurance. A contemporaneous email asking the seller to confirm a specification may be useful even if the seller did not answer, although silence should not simply be treated as agreement.

Explain why the promise mattered Describe how the assurance affected your purchase: compatibility with existing equipment, suitability for a particular use or a completion commitment. Compare it with any contradictory written terms supplied before payment.

For advertising claims, assemble the original sales description. Add the conversation to the complaint chronology and identify any witness who can provide their own account without being coached to repeat yours.

Place the assurance within the sales conversation Identify the date, location and stage of the purchase when the words were spoken. Record whether the consumer was comparing products, placing an order or seeking help after payment. Include the question or concern that prompted the answer. A statement about suitability made before purchase may require a different assessment from a later suggestion about how to use the item. The surrounding exchange helps a reviewer understand what the salesperson appeared to be answering and whether the consumer's interpretation was reasonable.

Identify the speaker as accurately as the evidence allows, using a name, role, appointment record or other reliable detail. Do not guess a name because another employee later took over the complaint. If several staff members were involved, attribute each statement separately and mark any uncertainty. Keep any order note or business card that helps connect the conversation to the trader. The evidence should show who said what, rather than combining different conversations into a single polished account that nobody actually remembers hearing.

Preserve recollection without making it artificially precise Write the account promptly and date the note when it is created. If it is being written long after the conversation, say so and identify the records used to refresh memory. Use quotation marks only for words remembered with the claimed precision. A fair paraphrase can still be useful if clearly labelled. Do not improve the salesperson's wording to make it sound like a formal guarantee or remove a qualification simply because the qualification makes the legal position less certain.

Ask anyone who heard the conversation to record their own recollection independently. They should identify where they were, what they heard and any limits on their memory. Preserve differences between the accounts rather than editing them into identical statements. If someone only heard the consumer describe the conversation afterwards, distinguish that from witnessing the original assurance. Such a later communication may help show what the consumer understood at the time, but it should not be presented as direct evidence of the salesperson's actual words.

Find records that support or qualify the account Look for messages, appointment notes or order details referring to the promised feature or outcome. An email sent shortly after the visit may record the concern discussed, while a product selection can help explain the context. Preserve the complete exchange, including a reply that disputes or narrows the assurance. If the trader may hold a relevant call or sales record, ask promptly through an appropriate channel about its availability and preservation. Do not claim that such a record exists unless that has been established.

Compare the assurance with information given before the agreement was made. Record any apparent conflict and how it was addressed in the conversation. Business Companion explains that consumer contracts may be formed verbally, in writing or by conduct, and discusses agreed terms alongside statutory obligations. That provides context for considering spoken promises; it does not mean that every encouraging sales remark automatically becomes an enforceable guarantee. The words, timing, subject matter and surrounding evidence remain important to their legal significance. [2]

Present the promise and reliance as separate questions Explain first what was said and then what the consumer did because of it. If the consumer chose a particular model, paid for an option or proceeded despite a stated concern, identify that action and its supporting record. Avoid assuming that an assurance influenced the purchase merely because it would have been useful. State the actual account honestly, including where the consumer had already made the decision or received different information that may affect the assessment of reliance.

Put the relevant assurance to the trader in a focused complaint and ask for its response. Identify the requested remedy without overstating what the evidence proves. If the trader says its staff had no authority to make the promise, retain that explanation and seek advice about its significance under the actual arrangement. An independent reviewer can then assess the spoken statement, the supporting records and the contractual context together. The strength of the complaint comes from a reliable account of the real exchange, not from turning imperfect recollection into apparent certainty.

Frequently asked questions

Why should I record the question that prompted a salesperson's assurance?

It helps establish what the answer concerned and whether the consumer's interpretation fits the conversation and the decision being made at that time.

How should I prepare a note when the sales conversation happened months ago?

Date the note now, explain the delay and identify any records used to refresh memory, clearly separating remembered words from paraphrase or inference.

Should two witnesses edit their memories into one matching statement?

No. Preserve independent accounts and any differences, including each person's position, what they heard and the limits of their recollection.

Is someone who heard my later description a witness to the original promise?

No. Distinguish their knowledge of your later account from direct observation, while retaining any contemporaneous communication that may help explain your understanding.

What if the trader argues that the salesperson lacked authority to make the promise?

Keep that response with the sales evidence and obtain advice about its significance, rather than assuming it automatically resolves the contractual issue.

Official sources

Sources checked: 9 September 2026. Check the linked guidance for subsequent changes.

  1. Business Companion — Consumer contracts
  2. Business Companion: Consumer contracts, general

General information only. The appropriate action depends on your circumstances and the applicable jurisdiction.

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