Mastercard 4834: Point-of-Interaction Error

A Mastercard dispute reason code, what it asks you to prove, and what Do The Proof puts in the response.

What this code means

Debited twice, amount differs, currency error, ATM cash, loss/damage charges, surcharge, unreasonable amount

Point-of-Interaction Error (Message Reason Code 4834/34), Mastercard, Chargeback Guide Merchant Edition, 13 May 2025, p. 593
Condition	Claim	Acquirer Second Presentment
Cardholder Debited More than Once for the Same Goods or Services p. 597	the cardholder was debited more than once for the same goods or services, this is often referred to as “paid by other means” p. 597	Two valid separate transactions occurred p. 599 Refund previously issued p. 601 Invalid chargeback p. 603
Transaction Amount Differs p. 606	the transaction amount was incorrect p. 606	Correct amount billed p. 609 Refund previously issued p. 610 Invalid chargeback p. 612
Cash was not properly provided from either a Purchase with Cash Back transaction or a Cash Back transaction without an Accompanying Purchase p. 615	cash was not properly provided from either a purchase with cash back transaction or a cash back transaction without an accompanying purchase p. 615	Cash properly provided p. 617 Refund previously issued p. 618 Invalid chargeback p. 620
ATM Funds Not Dispensed p. 623	some or all of the funds from an ATM withdrawal were not dispensed p. 623	Valid ATM transaction p. 625 Invalid chargeback p. 627
Charges for Loss, Theft, or Damages p. 630	the cardholder was billed for loss, theft, or damage in the same transaction as the underlying initial service p. 630	Cardholder Notified and Authorized Charges p. 632 Refund previously issued p. 632 Invalid chargeback p. 635
Currency Errors p. 638	the cardholder’s transaction was processed using the wrong currency p. 638	Correct Currency p. 640 Refund previously issued p. 641 Invalid chargeback p. 644
Merchant Refund Correcting Error Resulted in Cardholder Currency Exchange Loss p. 647	a merchant processed a refund to correct an error (instead of a reversal), which resulted in the cardholder experiencing a currency exchange loss p. 647	Refund previously issued p. 648 Invalid chargeback p. 651
Improper Merchant Surcharge (Canada, Intra-European and Inter-European transactions only) p. 654	an improper merchant surcharge was applied to the total transaction amount p. 654	Properly processed surcharge p. 655 Refund previously issued p. 656 Invalid chargeback p. 658
Unreasonable Amount (EEA, Gibraltar, United Kingdom) p. 661	the cardholder was debited for an unreasonable amount p. 661	Reasonable Amount p. 662 Refund previously issued p. 663 Invalid chargeback p. 665

What the network says wins it

correct amount billed

cash properly provided

Authorization and processing records

How the app handles it

Arrives in the app as: Duplicate

Proof this usually needs

How long you have to respond

Second presentment: 45 days from the chargeback
Acquirer reply: 30 days

Where this comes from

Mastercard, Chargeback Guide Merchant Edition, 13 May 2025
Stripe, reason code categories Accessed 8 September 2026.

Do The Proof drafts dispute responses for Shopify stores.

You pay when a dispute is won. Not before.