PayPal
From WHMCS Documentation
Revision as of 12:30, 6 March 2008 by 81.105.10.181 (talk) (New page: For PayPal invoices to be automatically marked paid when you receive a payment you need to enable IPN in your PayPal account. This is done from your PayPal account by going to My Account ...)
For PayPal invoices to be automatically marked paid when you receive a payment you need to enable IPN in your PayPal account. This is done from your PayPal account by going to My Account > Instant Payment Notification Preferences. You need to enable IPN and leave the callback URL blank.