WP Simple Pay Documentation
Advanced Usage
Discover advanced ways to use and modify WP Simple Pay's functionality.
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Why is stripe.js Loaded on Every Page?
Learn about handling the stripe.js file that vastly reduces potential fraud.
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How to Block Prepaid Credit Cards
Prepaid cards are often used in financial scams. Unlike reloadable cards, some prepaid cards don’t require users to provide personal information.
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simpay_recurring_description_format
Filter the installment description format key used for a specific payment form.
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How to Update Your ACH Direct Debit Settings for NACHA Compliance
Starting in 2026, NACHA (the organization that governs ACH payments in the U.S.) introduced new rules requiring ACH Direct Debit transactions to include a classification that identifies whether a payment is for goods,...
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How to Launch Overlay from Other Buttons or Links
Learn how to launch a custom overlay or Stripe Checkout payment form from custom buttons or links.
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How to Add Custom CSS to WP Simple Pay
Learn how to style WP Simple Pay payment forms with custom CSS.
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How to Configure an Advanced Stripe Webhook Setup
Learn the Advanced setup options for webhooks. This is not needed for most sites.
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How to Add Custom Code to WP Simple Pay
Learn how to add specific functionality to WP Simple Pay payment forms via custom code.
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How to Customize the Payment Method Appearance
Learn how to customize the appearance of Stripe's secure iframe elements.
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How to add conversion tracking codes to WP Simple Pay
Learn how to add tracking codes to WP Simple Pay
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How Can I Use a Restricted API Key?
Learn how to manually supply a restricted Stripe API key (advanced).
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How to Translate WP Simple Pay
Learn the recommended way to translate WP Simple Pay into another language.
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