Mastercard Chargeback Reason Codes: What Each One Means and What Answers It

Every Mastercard chargeback carries a four-digit message reason code, and most of them now arrive as one of a handful of numbers: 4808, 4853, 4837 or 4834. Mastercard has folded its older codes into a few broad ones, so the code tells you the family and the issuer's documentation tells you the actual claim. A 4853 can mean an item never arrived, a subscription kept billing after cancellation, or a refund you promised and never processed, and each one is answered differently.

This guide covers every current Mastercard reason code, the conditions an issuer has to meet to use it, and the evidence that answers it. It is based on the Mastercard Chargeback Guide, Merchant Edition, dated 19 May 2026. It is the companion to our guide to Visa chargeback reason codes. The guide carves out exceptions for individual countries throughout, so treat what follows as the general rule for US merchants and confirm any code you rely on with your processor.

The four chargeback groups

Mastercard sorts disputes into four categories, each with its own reason codes:

• Authorization-related: 4808. The issuer says the transaction was not properly authorized.
• Cardholder disputes: 4853, plus 4850 for installment billing in participating countries and 4854 for certain US domestic disputes. The cardholder took part in the transaction but has a complaint about what they got.
• Fraud: 4837, 4870, 4871 and 4849. The cardholder says they did not authorize the transaction, or the merchant is in a Mastercard fraud program.
• Point-of-interaction error: 4834. Something is wrong with the details of the transaction, such as the amount or a duplicate charge.

Debit Mastercard transactions processed on Mastercard's Single Message System use two-digit versions of the same codes, such as 08, 53, 37 and 34. Mastercard also uses 4804, 4809 and 4811 to charge back certain transactions automatically, but only between a Europe acquirer and a non-Europe issuer.

Legacy codes you will still see

Older codes have not disappeared yet. The current guide says issuers may still use 4807 and 4812 in place of 4808; 4841, 4855, 4859 and 4860 in place of 4853; and 4831 and 4846 in place of 4834, but that each of these "will eventually be eliminated" and Mastercard recommends the consolidated code. If your processor forwards a 4855, it is a goods-not-provided cardholder dispute. A 4841 is a cancelled recurring transaction or a digital goods dispute. A 4860 is a refund-not-processed claim.

How a Mastercard dispute runs

The issuer files the chargeback. Your acquirer can answer it with a second presentment, Mastercard's term for representment, which for most transactions must be processed within 45 calendar days of the chargeback's settlement date. If the issuer still disagrees it can file a pre-arbitration case, which your acquirer has 30 calendar days to accept or reject, and then an arbitration case, where Mastercard decides who is liable. An issuer gets one chargeback per transaction amount.

Two rules decide many cases before the evidence does. First, supporting documentation for a second presentment has to reach Mastercom, Mastercard's dispute system, within eight calendar days of the second presentment for most transactions, and Mastercard will not consider second presentment documentation received on or after the date a pre-arbitration or arbitration case is filed. Second, those 45 days belong to your acquirer, not to you. Processors set shorter internal deadlines so they have time to file. Our guide to chargeback pre-arbitration and arbitration covers the later stages.

Refunds need care too. If you refunded the transaction before the second presentment, your acquirer has to document that refund in the second presentment. If you refund after the second presentment, the guide says recovering the duplicate credit must happen outside the chargeback process, for example through a good-faith collection letter from your acquirer to the issuer. Once a chargeback has landed, do not also send a refund without talking to your processor first.

4808: Authorization-related

The issuer may use 4808 when any of the following applies:

• Authorization was required but not obtained.
• A transaction that did not need online authorization, such as an offline chip approval, was cleared more than seven calendar days after the transaction date.
• A refund was cleared more than five calendar days after the merchant agreed to give it.
• The cardholder's account is not in good standing and the authorization's chargeback protection period had expired when the transaction was cleared: 30 calendar days for a preauthorization and seven calendar days for most final and undefined authorizations.
• A card-not-present authorization was declined by the issuer and later approved through Mastercard's Stand-In or X-Code processing. This does not apply when the decline carried merchant advice code 02 (try again later), when the issuer itself later approved it, or when the merchant can prove the cardholder started the new request.

The issuer has 90 calendar days from the transaction's settlement date. For online merchants the exposure is mostly timing: capturing long after checkout on a final authorization, or letting refunds sit before they clear. Our guide to card retry rules covers how Mastercard's merchant advice codes govern retries.

4853: Cardholder disputes

Every 4853 requires that the cardholder took part in the transaction. The issuer can use it when the cardholder claims the goods or services were not as described or defective, were not provided, were digital goods of USD 25 or less bought without adequate purchase controls, or were counterfeit. It also covers a refund that was not processed, a recurring transaction cancelled before billing, an addendum or hotel no-show charge, a purchase that did not complete, a timeshare cancelled within Mastercard's time frame, and a refund posted as a purchase. Most 4853 conditions give the issuer 120 calendar days, measured from different starting points.

Not as described or defective

The cardholder must have contacted or tried to contact you, you must have refused to adjust the price, repair, replace or refund, and for goods the cardholder must have told you the goods were available for return. The condition is not available when you properly disclosed the condition of the goods at the time of sale, for example by selling them "as is". The issuer has between 15 and 120 days from the settlement date or the delivery date. Your answer is documentation that the goods or services were delivered as described, or were repaired or replaced, together with your response to the cardholder's specific complaint.

Goods or services not provided

This one has no requirement that the cardholder contacted you first: the cardholder needs to state only that they took part in the transaction and did not receive what they paid for. If you did not specify a delivery date, the issuer must wait 30 days from the transaction's settlement date before charging back, unless it learns you will not deliver, for example because you are out of business. If you did specify a date, the issuer has 120 days from the latest delivery date you gave. For services that stop part-way through, the issuer may charge back only the portion not received, and where no end date was defined Mastercard prorates over 18 months.

The chargeback is not available when the cardholder refused delivery, when goods are held in customs for unpaid duty, or when the cardholder signed a waiver making proof of dispatch binding. Your answer is proof the goods or services were provided.

Recurring transactions

Mastercard has two recurring conditions. In the cardholder version, the cardholder says they asked you to cancel and you kept billing, or that they did not realise they were agreeing to recurring charges. In the issuer version, the issuer charges back because it listed the account in Mastercard's Payment Cancellation Service, because it has already charged back a recurring transaction on the same card with the same merchant, or because it told you or your acquirer to cancel. The second route matters most for subscription merchants: once one recurring charge on a card has been charged back, the issuer can charge back later charges to that card by citing the earlier chargeback and the cardholder's cancellation notice. Keep billing a card after a recurring chargeback and you should expect the next charge to come back too.

The guide requires recurring terms to be clearly detailed to the cardholder and "separate and distinct" from your general terms of sale. A second presentment can show that the transaction was not recurring, that recurring terms were properly disclosed and accepted, that the cardholder did not follow the contract's cancellation terms, or that the cardholder kept using the service after the cancellation date. A statement that the cardholder never contacted you to cancel is expressly not a valid second presentment. Our guide to free trial and subscription billing rules covers the disclosure requirements.

Digital goods of USD 25 or less

For e-commerce purchases of digital goods of USD or EUR 25 or less, the issuer can charge back when you did not offer three minimum purchase controls: an option, on by default, to disable all digital goods purchases; a purchase window of no more than 15 minutes after the cardholder enters their account credentials; and a chance to confirm or cancel the clearly displayed total before each purchase completes. The same transactions cannot be charged back as fraud under 4837, so for low-value digital sales these purchase controls are your defence.

Refund not processed

The issuer can use this when you agreed to a refund and did not process it, did not disclose a refund policy and will not accept a return, did not respond to a return or cancellation, or refunded a reduced amount without proper disclosure. The guide is direct about the stakes: failing to disclose a refund policy results in the merchant having to accept the goods for return and issue a refund. A disclosed policy such as "no refunds" or "in-store credit only" binds the cardholder. Unrefunded shipping or handling charges on a buyer's-remorse return cannot be charged back. The issuer generally has between 15 and 120 days from the date on the refund documentation or the date of the return or cancellation.

Other cardholder dispute conditions

• Timeshares: the cardholder cancelled within 14 days of the agreement date (90 days for intra-European and inter-European transactions), which the guide applies regardless of the contract's own terms.
• Addendum and hotel no-show charges: a later charge from the same merchant after a valid transaction, or a no-show charge the cardholder disputes.
• Transaction did not complete: the cardholder's device, your website or your terminal appeared to stop responding and the cardholder did not receive the goods or services.
• Counterfeit goods sold as authentic, and a refund that was posted to the account as a purchase.

For gambling, investment and similar purchases, a cardholder dispute is available only when the purchased value failed to appear in the agreed account, not for withdrawals, account terms, winnings or losses. Gaming merchants such as MCC 5816 digital games are not covered by that limitation.

4854 and 4850

4854 is a US domestic code for disputes that fit no other reason code and that reflect a claim or defense under federal, state or local truth-in-lending law. Both banks must be in the US, the transaction must exceed USD 50, and the cardholder must have tried and failed to resolve it with you. 4850 covers installment billing disputes, such as the wrong number or amount of installments, in the countries that participate in Mastercard's installment program.

Fraud: 4837, 4870, 4871 and 4849

4837: No Cardholder Authorization

The code most card-not-present merchants see. The issuer must report the transaction to Mastercard's Fraud and Loss Database on or before the chargeback date and has 120 calendar days from the transaction. 4837 is not available when:

• The transaction was properly authenticated, for example through Mastercard Identity Check, and identified with a security level indicator of 211, 212, 217 or 242. This extends to related later transactions such as a partial shipment or recurring payment.
• The issuer approved the transaction after it had already filed two or more fraud chargebacks on the same card account, or it has filed more than 35 fraud chargebacks on that account.
• An e-commerce, mail order or phone order transaction was approved although the CVC 2 check returned a mismatch.
• The loss came from an account takeover or a fraudulent application reported as such, or the transaction was an addendum charge.

If none of those applies, the main answers are an AVS response of X or Y with the goods shipped to the AVS-confirmed address, or compelling evidence of the cardholder's participation. For e-commerce that can be correspondence with the cardholder, proof of in-store pickup, or, where customers must register before buying, a registered account with an authentication method plus evidence such as earlier undisputed purchases or the order coming from a registered device and IP address. The guide is explicit that this right does not apply to guest checkouts. For recurring transactions you need the original authorization date and approval code, a CVC 2 match or authenticated first transaction, and proof the cardholder agreed to recurring terms, such as a click-to-accept record.

Mastercard's First-Party Trust program adds a route before the chargeback: a 4837 can be rejected when the merchant's data meets the program's requirements. Under the guide, an issuer can resubmit a rejected claim only after closing and blocking the card account and providing either a notarised cardholder affidavit for US cards or a signed issuer attestation. Our guide to Mastercard First-Party Trust covers the requirements.

4870 and 4871: chip liability shift

These cover counterfeit and lost, stolen or never-received chip cards used at terminals that did not properly support the chip or PIN. The guide excludes mail order, phone order, e-commerce and recurring transactions from 4870, so an online merchant will rarely see either code.

4849: Questionable merchant activity

4849 is not about a single order. The issuer can use it when Mastercard has listed the merchant in an announcement under its Questionable Merchant Audit Program, or has determined, in writing, that the merchant was processing coerced transactions. Once a merchant is listed, issuers can charge back fraud-reported transactions within 120 days of either the announcement that first listed the merchant location or the transaction itself, and a 4849 may follow an unsuccessful chargeback for a different reason. By then the problem is the account, not the evidence. Our guide to Mastercard's chargeback monitoring programs covers how merchants get there.

4834: Point-of-interaction errors

4834 covers processing mistakes rather than complaints about the purchase. The cardholder says they paid twice using two different payment methods, were charged more than once for the same transaction, or were billed the wrong amount. It also covers dynamic currency conversion disputes, late presentment, and cash back or ATM errors. Claims of an improper surcharge apply only to Canadian and European transactions, and claims of an unreasonable amount only to transactions in the EEA, Gibraltar and the UK. The answers are records, such as two receipts for two separate purchases. A cluster of 4834s usually points to a gateway or checkout bug, not to customers.

What your Mastercard dispute mix tells you

Read your reason codes as a diagnosis. 4837 points to fraud screening, authentication and the data you capture at checkout. 4853 not-provided claims point to fulfilment and delivery records, recurring claims to subscription disclosure and cancellation handling, and refund claims to your refund policy and how fast refunds clear. 4808 and 4834 point to authorization timing and processing errors. For how long each code stays open after the sale, see our guide to chargeback time limits. PayKings works with the subscription, digital goods and high-risk merchants these rules single out. If your Mastercard dispute mix is putting your account at risk, talk to us about processing built for your business model.