Reference pagesReason codes
Mastercard-initiated dispute
Mastercard 4809: Transaction Not Reconciled
A Mastercard dispute reason code, what it asks you to prove, and what Do The Proof puts in the response.
This code cannot be answered
Mastercard raises this dispute itself rather than a cardholder, and its own rules do not allow a response to it. There is nothing to send, so there is nothing for the app to submit for you. A dispute that arrives under this code is closed by the network, and that is what the app shows.
What this code means
Raised by Mastercard, not the cardholder, and only between a Europe acquirer and a non-Europe issuer
What the network says wins it
Second presentments are not permitted
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.
Where this comes from
Other Mastercard-initiated dispute codes
Do The Proof drafts dispute responses for Shopify stores.
You pay when a dispute is won. Not before.