How to Create a New Checkout Payment Gateway in Fynlo

You can create a new Checkout payment gateway in Fynlo to allow your clients to pay invoices online using your Checkout.com credentials.

Follow the steps below to set it up.

Before You Start

Make sure you have the following from Checkout.com:

• Public Key (pk_...)

• Secret Key (sk_...)

• Process Channel ID (pc_...)

• Correct environment (Sandbox or Live)

If you don’t have these yet, please refer to the guide:
How to Connect Checkout.com to Fynlo

Step 1: Go to Payment Gateways

1. Log in to your Fynlo account

2. Click Settings

3. Select Payment Gateways

You will see a list of existing gateways (if any).

Step 2: Create a New Checkout Gateway

1. Click New Payment Gateway

2. Under Platform, select Checkout

Step 3: Enter Your Credentials

Fill in the required fields:

⚠️ Make sure:

• You do not mix Sandbox and Live keys

• There are no extra spaces when pasting

Step 4: Save the Gateway

Click Save.

Your Checkout payment gateway is now created and ready to use.

Step 5: Enable It on Your Invoices

To allow clients to pay using Checkout:

1. Create or open an invoice

2. Ensure online payment is enabled

3. Send the invoice

When your client opens the invoice, they will see the payment option.

How to Test the Gateway (Recommended)

If you are using Sandbox keys:

1. Create a test invoice

2. Send it to yourself

3. Open the invoice link

4. Attempt a payment

If the payment page loads correctly, your setup is successful.

Common Issues

Payment Button Not Showing

• Confirm the gateway status is set to Active

• Make sure the correct credentials were entered

Payment Fails

• Verify that the Public Key, Secret Key, and Channel ID are correct

• Ensure all credentials belong to the same environment (Sandbox or Live)