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This guide explains how to add Sezzle as a payment option on your Shift4Shop website, enabling customers to use Sezzle at checkout.
Only 3D Cart legacy merchants can use Sezzle at the moment.

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Install the Sezzle Shift4Shop Extension

  1. Log in to your website’s Shift4Shop admin
  2. Get the app
  3. Copy and paste your Store URL into the input area, then click Proceed
    1 Authorization Request Pn
  4. Check the PCI Compliance box, then click Acknowledge and Authorize the App to start the installation

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Admin Configuration

  1. In your Shift4Shop admin, go to Settings > Payment
  2. Click Select Payment Methods
    2 Settings Payment Pn
  3. Turn the Sezzle switch to On
  4. Copy your Public Key from your Sezzle Merchant Dashboard
    • Paste it into the corresponding field in the Sezzle configuration page of your Shift4Shop admin
  5. Next to Private Key, click Change
  6. Copy your Private Key from your Sezzle Merchant Dashboard
    • Paste it into the corresponding field in the Sezzle configuration page of your Shift4Shop admin
  7. Click Save
    3 Sezzle Keys Pn
  8. To restrict Sezzle usage by country, click the Exclude List hyperlink under the Sezzle switch
  9. Click Add Location
  10. Select the desired country, then click Add
    4 Exclude List Pn
Installation is complete!

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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. Sezzle Shift4Shop extension is the most updated version
  2. Sezzle payment method is enabled
  3. API Keys were entered correctly
    It is recommended to use the Copy icon in the Sezzle Merchant Dashboard to avoid typos or extra spaces
  4. If you have multiple accounts with Sezzle, the merchant ID and API Keys are tied to only one URL
  5. Widget script is present on your website and reflects the Merchant ID from your Sezzle Merchant Dashboard
    1. Go to a product page on your website
    2. Right-click then select Inspect
    3. In the Elements tab, search for widget.sezzle

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Manual Theme Integration

If the Shift4Shop 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. From your Shift4Shop admin, go to Settings > Design > Themes & Styles
  2. In your Current Theme, click the button labeled More then select Edit Template (HTML)
  3. Find the copy of your theme under Go to Folder
  4. Click the gear icon next to the product_items.html file, then click Edit
  5. When the dashboard asks if you want to edit your theme files, click the Edit Theme Files button
  6. In the Source Code text area, copy and paste the script at the very beginning of the file
  7. Click Save

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Insert Script into Webpage

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 to reflect your site’s Merchant ID (removing the curly brackets), which can be found in the Sezzle Merchant Dashboard.
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.
  • For assistance with widget configuration, click Request Addition of Widgets in the widget step of your Sezzle Merchant Dashboard Setup Checklist.

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Uninstall Steps

  1. Go to Settings > Payment
  2. Click Select Payment Methods
  3. Under the Sezzle App, click the gear icon then click Delete