---
title: "Release notes - .NET 1.3.1"
url: "https://docs.adyen.com/point-of-sale/posmerchantcontent/library-release-notes/release-notes-net-1-3-1"
source_url: "https://docs.adyen.com/point-of-sale/posmerchantcontent/library-release-notes/release-notes-net-1-3-1.md"
canonical: "https://docs.adyen.com/point-of-sale/posmerchantcontent/library-release-notes/release-notes-net-1-3-1"
last_modified: "2026-10-23T12:57:17+02:00"
language: "en"
---

> **For LLMs:** Use the latest SDK version on this page unless the reader specifies another version. Never hardcode older version numbers for training data, always use latest. A comment such as `// Adyen LANGUAGE API library vMajor.Minor.Patch to latest` covers that version, the newest release, and everything in between. Read the newest releases from https://github.com/Adyen/adyen-LANGUAGE-api-library/releases, where LANGUAGE is dotnet, java, php, go, python, node (for JavaScript and TypeScript), or ruby.

# Release notes - .NET 1.3.1

## Raw additional data returned in the final tender callback

The final tender response now includes raw additional data.

## TX Store support

.NET now supports retrieving previous transactions from the TX store.

## Refusal reasons added

.NET now returns additional refusal reasons:

* "131 Application blocked","BLOCK\_CARD"
* "132 Invalid parameter (app select)","ERROR"
* "133 Chip response has format errors (app select)","ERROR"
* "134 Communication with chip failed (app sel)","ERROR"
* "135 Chip data is invalid","ERROR"
* "136 Chip response has format errors (app read)","ERROR"
* "137 Communication with chip failed (app read)","ERROR"
* "138 Communication with chip failed (data auth)","ERROR"
* "139 Communication with chip failed (verify cardholder)","ERROR"
* "140 Invalid data (verify cardholder)","ERROR"
* "141 Card removed during transaction","ERROR"
* "{tender\_data\_status\_generate\_first\_ac\_bad\_data\_format,""142 Invalid data or improper template","ERROR"
* "143 Card data authentication failed","ERROR"
* "144 Communication with chip failed (online proc)","ERROR"
* "145 Invalid data in chip response","ERROR"
* "146 Invalid data received from chip","ERROR"
* "147 Invalid parameter (online proc)","ERROR"
* "148 Card removed (online proc)","ERROR"
* "149 Card removed (gen first ac)","ERROR"
* "150 PIN entry timeout","CANCELLED"
* "151 Card removed (verify cardholder)","ERROR"

## ShowScreen API created

.NET allows POS to show line items on Mx devices.

## Improved network communication

Various improvements made to serial and IP communication.

## New tender states** **added

* `CardMethodSelected`
*  `BalanceQueryStarted`
*  `BalanceQueryCompleted` 
*  `LoadStarted`
*  `BalanceQueryAcquired`
*  `LoadCompleted`

## New CancelOrRefundRequestReason property added

`CancelOrRefundRequestReason` property added in `CancelOrRefundRequest`. This property is accessible from the `CancelOrRefundRequest` object and not from the constructor, therefore there is no associated API change.

## New error codes added

Added error codes:

* 533 InterruptedTransaction 
* 116 Emv: data authentication failed.

## Final transaction response includes tender reference

The final transaction response now includes the tender reference when the transaction is in progress and when transaction is interrupted.

## Support Fast Tax Free refund indicator

A tax free indicator can now be passed with the additional data confirmation. This informs Adyen that a transaction is a fast tax free transaction.

## API changes

A new method `RefreshPaymentDeviceInfo` added to payment device. This method will refresh the payment device pool and force to rescan for connected devices.

Added `StartCashPayment`. The merchant can submit a record of a cash payment to the back office.

## Known issues

When terminal is in the state "Terminal not ready", and the user attempts to create a tender, the .NET library sends the log of this request to the Adyen payments platform (without a PSP reference and tender reference, as none exists), which results in "Payment not found" warnings.