Mastercard 4840: Legacy code

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

This code is retired

Absent from the Mastercard Chargeback Guide of 13 May 2025 and consolidated into 4853, 4834 and 4808. The inventory records no retirement date, only the edition it is missing from, and it abbreviates the legacy names inside one grouped cell. The guide of 13 May 2025 does not mention this code anywhere, and the inventory does not name it, so this hub does not name it.

What this code means

Absent from the May 2025 guide; consolidated into 4853/4834/4808. Stripe still maps 4840→general

One other published list still prints it.

How the app handles it

Arrives in the app as: nothing. The sources do not record a label for this code, so a dispute carrying it arrives without one.

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.

Other Mastercard legacy codes

Do The Proof drafts dispute responses for Shopify stores.

You pay when a dispute is won. Not before.