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This guide explains how to add Sezzle as a payment option on your BigCommerce website, enabling customers to use Sezzle at checkout.
This integration is only available with BigCommerce’s Optimized One Page Checkout.

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Enable Sezzle as an online payment method

Get the app
  1. Go to Store Setup > Payments
    1 Payment Methods Add Pn
  2. Go to Online Payment Methods, find Sezzle and click Set up
    2 Setup Payments Sezzle Pn
  3. Copy your Public Key and Private Key from your Sezzle Merchant Dashboard
    • Paste them into the corresponding fields
  4. Select the Transaction Type
    If you select Authorize only, payment will only be authorized and will have to be captured later in BigCommerce.
  5. Select the Test Mode (No (Recommended) or Yes for testing)
  6. Click Save

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Install the Sezzle BigCommerce App

  1. Log in to your website’s BigCommerce store admin page
  2. In the left sidebar, click Apps > Marketplace
  3. Click BigCommerce.com/Apps
    3 Apps Pn
  4. Search for Sezzle
    4 App Search Sezzle Pn
  5. Click Sezzle, then click Get This App
    5 App Marketplace Sezzle Pn
  6. Click Install
    6 Apps Install Sezzle Pn
  7. Check the PCI Compliance box, then click Confirm to start the installation
    7 Requesting Access Sezzle Pn

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Widget Pre-Configuration

  1. Make sure you have the Sezzle App installed in your store
  2. Go to Apps > Sezzle
  3. Copy your Merchant ID from your Sezzle Merchant Dashboard
    • Paste them into the corresponding fields in the Sezzle App of your BigCommerce admin
  4. Check the Add Sezzle Widget Script box
    • This will inject the widget script into the product and cart pages of your store
  5. Save the configuration

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Validate

Step through a test checkout to validate the integration is properly installed.

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Troubleshooting

If testing was unsuccessful, review the following:
  1. Site has Optimized One-Page Checkout enabled
    • Go to Advanced Settings > Checkout
  2. API Keys were entered correctly
  3. If you have multiple accounts with Sezzle, each store has its own merchant ID and API Keys that are tied to the store’s URL
  4. Add Sezzle Widget Script box is checked
  5. Widget script is present on your website and reflects the Merchant ID from your Sezzle Merchant Dashboard
    • Go to a product page on your website
    • Right-click then select Inspect
    • In the Elements tab, search for widget.sezzle

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Manual Theme Integration

If the Sezzle App fails to maintain the widget script on the product pages, or to add the script manually for additional pages, complete the following steps:
  1. Go to Storefront > Script Manager
  2. Click the Create a Script button
  3. Set Name of script to Sezzle Widget
  4. Set Location on page to Footer
  5. Set Select pages where script will be added to All pages
  6. Set Script category to Essential
  7. Set Script type to Script
  8. In the Script content area, copy and paste the script, then click Save
The script to be inserted into your webpage is as follows:

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Template

<script src="https://widget.sezzle.com/v1/javascript/price-widget?uuid={sezzle_merchant_uuid}"></script>
Update {sezzle_merchant_uuid} in the above script template with your site’s Merchant ID (removing the curly brackets), which can be found in the Sezzle Merchant Dashboard.

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Example

<script src="https://widget.sezzle.com/v1/javascript/price-widget?uuid=12a34bc5-6de7-890f-g123-4hi5678jk901"></script>
Instructions may vary slightly depending on your active plug-ins. If the issue persists after completing the above steps, look for other available features that allow the addition of a custom HTML code snippet to the site footer. If no such feature is found, the below steps may be followed as a last resort:
  1. Go to Storefront > My Themes
  2. In your Current Theme, click Advanced then select Edit Theme Files
  3. In the confirmation window, click Edit Theme Files
  4. In the file list, go to templates > pages, then select product.html
  5. Copy and paste the script into the very bottom of the file, then click Save and Apply Files
  6. Repeat the previous step for the cart.html file
For any kind of assistance, reach out to [email protected].

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Uninstall Steps

  1. Go to Apps > My Apps
  2. Under the Sezzle App, click Uninstall
    8 My Apps Sezzle Uninstall Pn
  3. Toggle the button against Sezzle under Store Setup > Payments > Online Payment Methods to disable Sezzle as a payment option