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This guide explains how to add Sezzle as a payment option on your Open Cart website, enabling customers to use Sezzle at checkout.
Sezzle supports Opencart versions 3.0.3.7.

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Installation

  1. Download the Sezzle module from the Opencart Marketplace
  2. In your Opencart back office, go to Extensions > Installer
  3. Select Upload and select the .zip file that you downloaded
  4. Go to Extensions > Payments
  5. Find Sezzle, and select Enable Module
    • The plugin is ready to be configured
      To learn how to install the plugin after you’ve downloaded it, watch the official Opencart video tutorial

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Configuration

  1. In your Opencart admin, go to Extensions > Payments
  2. In the Payments section, find Sezzle and select Configure
  3. Fill out the following fields
After saving if you don’t see the widget in PDP, contact merchantsupport@sezzle.com.

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Payment Capture

Payment Action set as Authorize and Capture

  • Payment will automatically be captured during the checkout process.

Payment Action set as Authorize Only

    1. In your Opencart back office, go to Sales > Orders
    1. Select the order in which you want to capture the payment
    1. Go to the Sezzle tab
    1. Enter the capture amount
    1. Click Capture Payment

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Payment Refund

  1. In your Opencart back office, go to Sales > Orders
  2. Select the order for which you want to refund the payment
  3. Go to the Sezzle tab
  4. Enter the refund amount
  5. Click Refund Payment

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Payment Release

  1. In your Opencart back office, go to Sales > Orders
  2. Select the order for which you want to release the payment
  3. Go to the Sezzle tab
  4. Enter the release amount
  5. Click Release Payment

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Upgrading the module

If you are using an older Sezzle Opencart module version and want to use the latest version follow these steps:
  1. Uninstall the existing Sezzle module
  2. Install the latest plugin version as described in Installation
  3. Configure the latest plugin version as described in Configuration