About Payment Modules
What payment processing options are available?
Payment
Taking Payments For Orders
PCI
What is PCI and how does it affect me?
How do I get paid?
Understanding payment collection for your orders
Authorize.net AIM Payment Module
Zen Cart Authorize.net AIM Payment Module
Authorize.net CIM Payment Module
Zen Cart Authorize.net CIM Payment Module (for card on file)
Authorize.net SIM Payment Module
Zen Cart Authorize.net SIM Payment Module (DEPRECATED)
Balance Owed Payments
Taking payment for balances owed
Card Number Validation
How are credit cards validated?
Credit Card Authorize vs Capture
How do I authorize a Credit Card but not actually charge it until I ship the goods?
Manual Credit Card Collection
Why you shouldn’t use manual credit card processing with online stores
Manual Credit Card Collection - Migrating Away
Getting off manual card collection
My Payment Methods aren't showing up during checkout
Payment Method problems
Offline Payment
Taking payment outside the checkout flow process
PayPal - Overview
Start here to learn about options for using PayPal
PayPal Commerce
PayPal Commerce, 3D Secure
PayPal Error Messages
Understanding the various PayPal errors
PayPal Express Checkout setup
The preferred way to use PayPal in Zen Cart
PayPal Paying with Credit Card vs a PayPal Account
Customer questions regarding PayPal
PayPal RESTful
The updated PayPal Integration
PayPal Standard - Potential Problems
Why you shouldn’t use PayPal Standard
PayPal Standard, Express and Pro - what's the difference?
Zen Cart PayPal Standard, Express and Pro - what’s the difference?
PayPal using one account on multiple sites
Consolidating PayPal accounts
PayPal/IPN Troubleshooting
Resolving problems with PayPal
Retirement for a Payment Module
Disabling storefront access to a payment module while keeping its admin capabilities
Square API Version
Setting and changing the API version for Square
Square for PHP 8+
How to purchase the latest Square module
Square Payments Form Module
The original Zen Cart Square Module (DEPRECATED)
Square WebPay
How to collect payments with Square
Square WebPay - Avoiding Token Expiry
Preventing “OAuth access token has expired”
Square WebPay Errors and Issues
Handling problems with Square WebPay
Store Credit
How Can I Issue Store Credit instead of a Refund
Testing your payment module
Best practices for being sure a payment module is ready to use
Whoops timeouts after payment
Error when you return to your cart after offsite payment
Do you have a suggestion for a FAQ? Please post it to General Questions on the support forum.
Last modified August 29, 2020 by Scott C Wilson (8de0edc3).