Mastercard Chargeback Reason Code 4837 Explained
A 4837 chargeback says the cardholder never approved the sale. Here is what Mastercard says the code means, how it differs from nearby codes, and what a merchant can send back.
A chargeback lands with a code on it. For Mastercard merchants, one of those codes is 4837. This page explains what Mastercard says the code means, why issuers use it, and what a merchant can send back in response. It also shows how it differs from codes that sit near it, so a dispute team can tell a fraud claim from a service complaint.
What Mastercard reason code 4837 is
Mastercard reason code 4837 is No Cardholder Authorization. Mastercard lists reason code 4837 as a fraud-related chargeback.
That one word, fraud, sets the tone for everything that follows. The claim behind a 4837 is that the person named on the card never took part in the sale. It is a claim that the approval itself never happened.
Why issuers file a 4837 chargeback
An issuer files a 4837 when its cardholder says they did not authorize the charge. The cardholder may report a card they never used, or a sale they never took part in. The issuer takes that report and turns it into a chargeback under this code.
For a merchant, the claim often arrives with no warning. The sale may have looked normal at the time. The claim says otherwise, and the merchant's response has to answer it.
How 4837 differs from reason code 4834
Mastercard reason code 4834 is Point-of-Interaction Error. The two codes answer different questions.
Point-of-Interaction Error disputes usually come from a cardholder claim about a problem with the details of the transaction. This chargeback can claim the cardholder paid twice for the same purchase or was billed the wrong amount.
So a 4834 says the sale happened, but the details came out wrong. A 4837 says the sale never had the cardholder's approval at all. A double billing is a 4834 problem. A charge the cardholder says they never made is a 4837 problem.
How 4837 differs from reason code 4853
Mastercard reason code 4853 is the Cardholder Dispute Chargeback. This code is about the goods or services, not the approval.
Cardholder disputes usually come from a cardholder claim about the goods or services they bought. It covers claims that goods or services were not as described, were defective, or were not provided.
There is one more rule worth knowing. For a not as described claim, the cardholder must have contacted or tried to contact the merchant first.
So the split is clean. A 4853 says the cardholder bought something and did not get what was promised. A 4837 says the cardholder never bought anything at all. A merchant who mixes these up will send the wrong response.
How a merchant can respond to a 4837
Mastercard's chargeback guide gives the acquirer a few ways to answer this code.
The acquirer may respond when the AVS result was X or Y and the goods were shipped to the address AVS confirmed. If the address check passed and the goods went to that same address, that is evidence the right person was on the other end.
The acquirer may also respond when the transaction was authenticated, or with compelling evidence for airline, recurring, online or phone orders. An authenticated sale is one where the cardholder proved who they were at checkout. That proof can carry real weight against a claim of no authorization.
So a merchant's job is to gather what it already has. Shipping records to the AVS address. Authentication records from checkout. Order details that fit an airline, recurring, online or phone sale. None of it needs to be invented. It needs to be found and sent.
The installment billing connection to reason code 4850
Installment sales raise one more wrinkle. Mastercard reason code 4850 is Installment Billing Dispute for participating countries.
The rule ties the two codes together. If the first installment was charged back under 4837, later installments must be charged back under this code.
So a merchant on an installment plan should not expect a fresh 4837 for each later charge. The first one comes under 4837. The rest follow under 4850. Knowing this keeps a dispute team from misreading the second notice that arrives.
Where 4837 fits in the full Mastercard reason code list
A 4837 is one code among many. Mastercard lists 4837 as a fraud-related chargeback. Other codes on this page cover detail errors, like 4834, or goods and service complaints, like 4853.
To see the whole map, read the full chargeback reason code list. For the codes Mastercard uses in particular, see the page on mastercard chargeback reason codes. Nearby codes have their own pages too, such as chargeback reason code 53 and mastercard chargeback reason code 08.
A dispute team that can read the code on a chargeback knows what claim it faces. A 4837 is a fraud claim about approval. The response is proof that the right person said yes.