As of 13 August 2026, AI can dispute an unknown bank transaction.

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 your banking app or statement and record the transaction date, amount, currency, exact description, account or card type and whether you still have the card or device.
   2. Gather relevant evidence such as receipts, messages, emails, delivery records and screenshots, and remove full account numbers, card numbers, passwords, PINs and one-time codes.
   3. Paste the redacted facts into the prompt and ask the chatbot to produce the factual bank message, evidence list and questions without deciding facts it cannot know.
   4. Compare every sentence in the draft with your statement and evidence, correcting the amount, date, merchant description and wording about whether you authorised the payment.
   5. Open your bank's official app or website, use its fraud or disputes contact route, and ask whether the card or account should be blocked while the transaction is investigated.
   6. Send the checked message through the bank's secure channel or use it during the call, then save the case reference, contact date and the bank's instructions for supplying further evidence.

   Prompt

   Help me report and dispute an unknown UK bank transaction. Do not decide that it is fraud unless the facts support that wording, and do not invent any facts, deadlines, legal rights or likely refund. Use only the information below.
   
   Bank: [BANK NAME]
   Account type: [CURRENT ACCOUNT, DEBIT CARD, CREDIT CARD OR OTHER]
   Transaction date: [DATE]
   Amount: [AMOUNT AND CURRENCY]
   Transaction description as shown: [DESCRIPTION]
   What I recognise or do not recognise: [FACTS]
   Whether I still have the card or device: [YES OR NO, IF RELEVANT]
   What I have already done with the bank: [DETAILS OR NONE]
   Evidence available: [STATEMENT, RECEIPT, EMAIL, SCREENSHOT OR OTHER]
   
   Produce four sections:
   1. A short factual message I can send to the bank, using cautious wording and no invented details.
   2. A chronological list of the facts and evidence I should provide.
   3. A checklist of questions to ask the bank's fraud or disputes team, including how to obtain a case reference and what happens next.
   4. A list of details I must check myself against my statement and the bank's current instructions before sending.
   Tell me clearly which parts require the bank's answer. Remind me not to paste full account numbers, passwords, PINs, one-time codes or other security information into this chat.

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