> ## Documentation Index
> Fetch the complete documentation index at: https://docs.chargeblast.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Alert Types

> A guide to all alert networks and data sources (subproviders) in Chargeblast.

## Overview

The `subprovider` field on alerts indicates the alert network or data source. Understanding these helps you route and handle alerts appropriately.

## Alert Networks

These are the primary alert products that require action to prevent chargebacks.

| Value    | Description                                                                                                                                                                                     |
| -------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `Ethoca` | Mastercard's Ethoca alert network. Provides early dispute notification with the best coverage, especially for Mastercard transactions (\~95% MC, \~30% Visa). Requires merchant-side refunding. |
| `CDRN`   | Visa's Cardholder Dispute Resolution Network. Issuer-based alert product focused on Visa transactions, though it also covers Mastercard and other schemes.                                      |
| `RDR`    | Visa's Rapid Dispute Resolution. Acquirer-side product where refunds are processed automatically by the acquirer — no merchant action required.                                                 |

## Card Network Alerts

Alerts from specific card networks.

| Value      | Description                                    |
| ---------- | ---------------------------------------------- |
| `Discover` | Alerts from Discover card network.             |
| `AMEX`     | Alerts from American Express network.          |
| `JCB`      | Alerts from JCB (Japan Credit Bureau) network. |

## Fraud Reports (Informational)

These are fraud reporting feeds that provide visibility into fraud claims. They are **informational only** and do not require action — no chargeback will result from these reports alone.

| Value  | Description                                                                                                                                                                                                                                     |
| ------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `TC40` | Visa fraud reporting system. TC40 reports are filed by issuers when a cardholder claims fraud. Use these to identify potentially fraudulent customers or transactions.                                                                          |
| `TC15` | Visa non-fraud chargeback reports. Similar to TC40 but for non-fraud disputes. Typically used for VAMP (Visa Acquirer Monitoring Program) reporting purposes. All TC15 alerts are sent with resolved status and do not require merchant action. |
| `SAFE` | Mastercard's System to Avoid Fraud Effectively. Similar to TC40, these are fraud reports filed by issuers.                                                                                                                                      |

## Other Values

| Value     | Description                                                                                     |
| --------- | ----------------------------------------------------------------------------------------------- |
| `Cancel`  | Cancellation-related alert. Requires subscription/service cancellation only — no refund needed. |
| `Unknown` | The subprovider could not be determined.                                                        |

## Recommendations

<Info>
  For maximum chargeback prevention, we recommend subscribing to **Ethoca**, **CDRN**, and **RDR**. Ethoca front-runs other alert types by \~7 days, so merchants with high resolve rates will see minimal duplicate alerts.
</Info>

<Note>
  **TC40**, **TC15**, and **SAFE** reports are useful for fraud analytics and reporting, but they don't require refunds or alert actioning.
</Note>