---
title: "Shift4"
slug: "shift4"
updated: 2025-11-21T11:42:41Z
published: 2025-11-21T11:42:41Z
canonical: "help.frisbii.com/shift4"
---

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

# Shift4

Shift4 is an acquirer, headquartered in Hafnarfjörður, Iceland.

> [!CAUTION]
> **Caution**
> 
> Please be aware of these prerequisites before starting the setup.
> 
> 1. You need to be already live with Frisbii Pay. It will not work in test mode.
> 2. Please set up a Shift4 account first.

## Set up Shift 4 in Frisbii

1. Open **Configurations** → **Checkout management** → **Payment methods**.
2. Click on **Credit card agreement**.

![](https://cdn.document360.io/b84e1b5d-2ba6-4465-8c62-fb45a2f31314/Images/Documentation/image-VOX89276.png)
3. Scroll and click on **Shift4**.
  1. Select payment methods you would like to use.
  2. Fill out the form:

| **Field** | **Information to put in** |
| --- | --- |
| Merchant id | Shift4 Gateway MID. Looks like this: 10082933 |
| Merchant Signature Key | Shift4 Authentication key. Looks like this: 1987654321098abczxy |
| Merchant Name | Your company information. |
| Merchant Address |
| Merchant City |
| Merchant ZIP code |
| Merchant Country |
| Business Code | MCC code (Business code). Looks like this: 8421 |
| Merchant website | Do not forget to put http:// |
| 3D Merchant ID | Shift4 CAID. Looks like this: 100000000089123 |
| Amex merchant ID | American Express Merchant ID, if you have been receiving Paper statements, your Merchant Account number can be found at the top right corner of the statement. It is also included at the top right corner of any email sent to you from American Express regarding your Online Merchant Account. |
  3. Click on **Create** in the top right corner.