AIB Bank basics and what they offer

AIB (Allied Irish Banks) is a major retail and commercial bank operating primarily in Ireland and the United Kingdom. They offer current accounts, savings accounts, mortgages, and business banking products. If you hold an AIB account, understanding how their dispute and refund processes work is important when something goes wrong—whether that's an unauthorized transaction, a merchant error, or a payment that didn't arrive.

AIB customers in Ireland and the UK have access to different dispute channels depending on where your account is held and what type of problem occurred. The bank is regulated by the Central Bank of Ireland (for Irish accounts) or the Financial Conduct Authority (for UK accounts), and both regulators set rules about how long AIB has to investigate complaints and what compensation you may be owed.

Most disputes with AIB follow a formal process: you report the issue to the bank, they investigate within a set timeframe, and if you disagree with their decision, you can escalate to an independent ombudsman. Knowing which process applies to your situation and what documents to gather upfront will speed things along.

Key Takeaways

  • AIB is regulated by the Central Bank of Ireland or the Financial Conduct Authority depending on whether your account is held in Ireland or the UK, and each regulator sets different timelines for dispute resolution.
  • Unauthorized transactions and merchant errors follow different investigation paths, so you need to report the correct issue type when you contact AIB.
  • AIB must acknowledge your complaint within one business day and provide a full response within 30 calendar days for most disputes.
  • If AIB rejects your complaint or you disagree with their decision, you can escalate to the Financial Services and Pensions Ombudsman (Ireland) or the Financial Ombudsman Service (UK) at no cost.
  • Keeping records of the transaction, any communications with the merchant, and your initial report to AIB will strengthen your case if the dispute goes to ombudsman level.

Reporting an unauthorized transaction to AIB

If you see a charge on your AIB account that you did not make or authorize, contact AIB when ready. The sooner you report it, the stronger your position. Call the number on the back of your card or log into your online banking to report the transaction through their find messaging system. Have your account number and the transaction details (date, amount, merchant name) ready when you call.

AIB will open an investigation and assign you a reference number. Write this number down—you will need it for all future correspondence. The bank will typically freeze the disputed amount while they investigate, meaning you will not lose access to that money during the process. They must acknowledge receipt of your report within one business day.

For the investigation itself, AIB will contact the merchant's bank and request evidence of the transaction. If the merchant cannot prove you authorized the payment, AIB will usually refund you. However, if you authorized the transaction but later changed your mind (called a "chargeback" dispute), the outcome depends on the payment type and the merchant's response. Debit card disputes generally take 20 to 40 working days; credit card disputes may take longer.

Merchant errors and refund requests

If a merchant charged you twice, charged the wrong amount, or took payment without delivering goods or services, you have a few options depending on how you paid. The fastest route is usually to contact the merchant directly and ask for a refund. Many will process this within 5 to 10 business days if the error is clear.

If the merchant refuses or does not respond, you can ask AIB to reverse the transaction. This is different from an unauthorized dispute—you are asking the bank to help recover money for a merchant error or non-delivery. AIB will contact the merchant's bank and request a refund on your behalf. This process typically takes 15 to 30 working days, depending on how quickly the other bank responds.

Keep records of all communication with the merchant: emails, chat transcripts, order confirmations, and delivery tracking. If the merchant promised a refund but did not deliver, screenshots of those promises will help AIB's case when they contact the other bank.

AIB's formal complaint process and timelines

If you are unhappy with how AIB handled your dispute or if they reject your claim, you can file a formal complaint. AIB must provide you with their complaints procedure in writing—they will do this automatically when you first report an issue, or you can request it by phone or through online banking.

Once you submit a formal complaint, AIB has 30 calendar days to investigate and send you a final response. If the matter is complex, they can extend this to 60 days, but they must tell you in writing within the first 30 days that an extension is needed. Their response will explain their decision and tell you how to escalate if you disagree.

During this time, AIB may ask you for additional information—proof of authorization, communications with the merchant, or details about how the transaction occurred. Respond to these requests promptly; delays on your end will extend the timeline. At the end of the investigation, AIB will either uphold your complaint (and refund you), reject it, or offer a partial refund.

Escalating to the ombudsman if AIB rejects your complaint

If AIB rejects your complaint or you disagree with their decision, you can escalate to an independent ombudsman at no cost. The ombudsman is separate from AIB and has the power to order the bank to refund you or pay compensation.

For Irish accounts, escalate to the Financial Services and Pensions Ombudsman (FSPO). You have up to one year from the date of AIB's final response to file a complaint with them. For UK accounts, escalate to the Financial Ombudsman Service (FOS). The timeline is similar—you generally have six months from AIB's final response, though there are exceptions.

To escalate, contact the ombudsman directly (not through AIB) and provide them with your case reference number from AIB, copies of your correspondence with the bank, and a brief explanation of why you disagree with their decision. The ombudsman will review the evidence and make a binding decision. This process usually takes 8 to 12 weeks, though complex cases may take longer.

Chargeback rights for card payments

If you paid with a debit or credit card and the dispute is not resolved in your favor through AIB's process, you may have additional rights under card network rules (Visa or Mastercard). These are called chargeback rights, and they allow you to dispute the transaction directly with your card issuer.

Chargebacks are separate from AIB's complaint process and have their own timelines and rules. You typically have 120 days from the transaction date to request a chargeback, though this varies by card type and reason. If you are considering a chargeback, tell AIB before you file one—some banks will not investigate their own complaint process if a chargeback is already underway, to avoid duplication.

Chargebacks are most useful when a merchant is unresponsive or when the transaction clearly violates card network rules (for example, a charge after you cancelled a subscription). They are less useful for disputes over the quality of goods or services, because the merchant can provide evidence that you received what you paid for.

Refund timelines and when money returns to your account

The timeline for a refund depends on the type of dispute and the outcome. If AIB upholds your complaint and issues a refund, the money typically returns to your account within 5 to 10 working days. If the refund comes from the merchant's bank (through a reversal or chargeback), it may take 15 to 30 working days because the other bank must process it first.

During the investigation period, AIB may place a temporary hold on the disputed amount so you cannot spend it, but you retain access to the rest of your account. Once the investigation concludes, the hold is lifted—either the money is refunded to you, or the charge stands and the hold is removed.

If you are waiting for a refund and need the money urgently, contact AIB and explain your situation. Some cases can be prioritized, though this is not may provide. If the refund is delayed beyond the expected timeframe, ask AIB for a status update and a new expected date.

Frequently Asked Questions

How long do I have to report an unauthorized transaction to AIB?

You should report it as soon as you notice it, but you have up to 13 months from the transaction date under EU and UK regulations. However, reporting within 30 days significantly strengthens your case, because AIB can more easily recover the money from the merchant's bank if the transaction is recent.

What if AIB says I authorized the transaction but I did not?

If you genuinely did not authorize it, tell AIB in writing and explain how your card details may have been compromised (lost card, phishing email, etc.). AIB must investigate and can only hold you liable if they prove you authorized it or were negligent in protecting your card. If you disagree with their conclusion, escalate to the ombudsman.

Can AIB charge me a fee to investigate a dispute?

No. AIB cannot charge you for investigating a complaint or dispute. If they ask for a fee, that is not standard practice and you should escalate the issue to the relevant regulator (Central Bank of Ireland or FCA).

What happens if the merchant's bank does not respond to AIB's investigation request?

If the merchant's bank does not respond within a reasonable timeframe (usually 20 to 30 working days), AIB can escalate the matter or issue a provisional refund while they continue investigating. Ask AIB for a status update if you have not heard back after 30 days.

Can I dispute a transaction if I changed my mind about the purchase?

Changing your mind is not usually grounds for a dispute with AIB or the ombudsman. However, if the merchant promised a refund or return period and refused to honor it, that is a different matter—you can dispute it as a merchant error or breach of contract. Check the merchant's return policy first.