> ## Documentation Index
> Fetch the complete documentation index at: https://docs.x402r.org/llms.txt
> Use this file to discover all available pages before exploring further.

# RefundRequestEvidence

> On-chain evidence submission for refund disputes

## Overview

* **Type:** Singleton (one per network)
* **Purpose:** Store evidence for refund disputes on-chain
* **Address:** `0x4089A5A853e9eF35f504B842795fB272dF69c739` (all chains)

## Features

* **IPFS CID storage** - Stores content hashes on-chain for evidence trails
* **EIP-712 signature approval** - Arbiter approves refunds with off-chain signatures (gas-free for arbiters)
* **Evidence indexing** - The contract indexes evidence by payment and submitting party
* **Multi-party submission** - Both payer and receiver can submit evidence

## How it works

When a payer or receiver disputes a refund, each side submits evidence (documents, screenshots, logs) to IPFS and records the CID on-chain. The arbiter reviews evidence off-chain and produces an EIP-712 approval signature that anyone can relay.

This keeps dispute resolution costs low, since the arbiter never has to submit an on-chain transaction.