---
title: "Fraud prevention guide for small businesses | Helcim"
slug: "fraud-prevention-a-merchant-guide"
description: "Learn how to protect your business from payment fraud. Explore Helcim's resources on identifying and preventing fraudulent transactions."
updated: 2025-06-13T03:10:14Z
published: 2025-06-13T03:10:14Z
canonical: "learn.helcim.com/fraud-prevention-a-merchant-guide"
---

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

# Fraud prevention: a merchant guide

Worried about payment fraud? We understand – protecting your business is a big deal. But you're in the right place!

This guide gathers our best straightforward articles, all packed with tips to help you spot risks, secure every sale, and make the most of Helcim's protective tools. Consider this your go-to spot for tackling fraud, made simple.

### Contents

---

| **Learn articles** |
| --- |
| ![Card vault tool icon in Helcim](https://cdn.document360.io/4e721329-1a9d-4ef0-8d2f-497e0c1f185a/Images/Documentation/card-vault(2).png) | [Card testing: what it is and how to prevent it](/v1/docs/understanding-preventing-card-testing) |
| ![Card vault tool icon in Helcim](https://cdn.document360.io/4e721329-1a9d-4ef0-8d2f-497e0c1f185a/Images/Documentation/card-vault(2).png) | [Keeping your Helcim merchant account secure](/v1/docs/keeping-merchant-account-secure) |
| ![Card vault tool icon in Helcim](https://cdn.document360.io/4e721329-1a9d-4ef0-8d2f-497e0c1f185a/Images/Documentation/card-vault(2).png) | [Using Helcim Fraud Defender](/v1/docs/using-helcim-fraud-defender) |
| ![Card vault tool icon in Helcim](https://cdn.document360.io/4e721329-1a9d-4ef0-8d2f-497e0c1f185a/Images/Documentation/card-vault(2).png) | [Understanding AVS response codes](/v1/docs/avs-response-codes-explained) |

| **Blog articles** |
| --- |
| ![Card vault tool icon in Helcim](https://cdn.document360.io/4e721329-1a9d-4ef0-8d2f-497e0c1f185a/Images/Documentation/card-vault(2).png) | [8 ways to spot and prevent card-not-present fraud](https://www.helcim.com/guides/card-not-present-fraud-prevention/) |
| ![Card vault tool icon in Helcim](https://cdn.document360.io/4e721329-1a9d-4ef0-8d2f-497e0c1f185a/Images/Documentation/card-vault(2).png) | [8 actionable tips to prevent card-present fraud](https://www.helcim.com/guides/prevent-card-present-fraud/) |