As of 13 August 2026, AI can only partly dispute an invoice from a supplier.

What to actually do

1. Hand it to a person

   The route this page recommends

   A person who owns the outcome does this end to end, worth it when the failure is dear.

2. Use a tool built for this

   Second choice

3. Do it yourself

   The distant third

   A chat interface, chat-fluent skill, and roughly 30 minutes until you can act on the result.

   How to actually do it

   1. Open the invoice, purchase order, contract or supplier terms, delivery notes, acceptance records and relevant emails, and remove unrelated personal data before sharing them.
   2. Write a short chronology of the order, delivery or work, the invoice, your objection and any previous response from the supplier.
   3. Paste the documents, chronology and desired outcome into the prompt, keeping the original wording of the relevant contract and invoice sections.
   4. Ask the model to separate facts from assumptions, list missing evidence and map each disputed invoice line to the supporting record.
   5. Compare the draft against the original invoice, contract wording, purchase order, delivery records and emails, correcting every amount, date, quotation and claimed event.
   6. Ask a colleague with responsibility for the supplier relationship or accounts to check the commercial facts and proposed outcome.
   7. Send the corrected dispute through the agreed supplier contact route, retaining the invoice, evidence, draft and sent message; ask a solicitor to review it if the amount or consequences are serious.

   Prompt

   Help me prepare a factual dispute of a supplier invoice under UK law, without giving legal advice or inventing facts.
   
   Supplier: [SUPPLIER NAME]
   Invoice number: [INVOICE NUMBER]
   Invoice date: [INVOICE DATE]
   Amount and currency: [AMOUNT]
   What is disputed: [DESCRIBE THE CHARGE OR PROBLEM]
   Relevant contract, order, quotation or terms: [PASTE THE RELEVANT TEXT]
   Goods or services received: [DESCRIBE WHAT WAS RECEIVED]
   What was agreed about price, scope, delivery or acceptance: [PASTE OR DESCRIBE THE EVIDENCE]
   Relevant dates and communications: [PASTE A SHORT CHRONOLOGY]
   Records supporting my position: [LIST OR PASTE THEM]
   What outcome I want: [CORRECTION, CREDIT NOTE, REPLACEMENT, PAYMENT PLAN OR OTHER]
   
   First, separate verified facts from assumptions and list any missing evidence. Then identify the specific invoice lines and contract wording that need addressing, quoting only text I provide. Draft a professional UK business email disputing only the amounts I have identified. Ask the supplier to confirm the position and provide any missing supporting documents. Do not assert that a term is legally invalid, threaten court action, claim a statutory right, or set a deadline unless the supplied documents clearly support it. Mark every point that needs checking by me before sending. Keep the tone firm, factual and non-accusatory.

   Open it prefilled in ChatGPT or Claude, or copy it into Gemini, which takes no prefill link.