> ## Documentation Index
> Fetch the complete documentation index at: https://kleros-mintlify-6ebc7975.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# ModeratedEvidenceModule

> ModeratedEvidenceModule contract reference: bonded evidence submission, challenge periods, and spam protection for Kleros V2 disputes on L2 chains.

Provides spam protection for evidence submission through a bonded challenge mechanism. On L2 chains where gas is cheap, spam evidence is a real concern this module requires deposits that can be challenged.

## How It Works

1. Evidence submitter posts evidence with a deposit
2. During the moderation period, anyone can challenge the evidence
3. If challenged, a dispute is created to determine if the evidence is spam
4. Spam evidence submitters lose their deposit; legitimate evidence is accepted

## Use Case

Particularly useful for disputes on Arbitrum where gas costs are low enough that malicious actors could flood a dispute with irrelevant evidence to confuse jurors.

[View Source](https://github.com/kleros/kleros-v2/blob/dev/contracts/src/arbitration/evidence/ModeratedEvidenceModule.sol)