After payment has been received, provide the customer with a link (example: [url=http://www.yourwebsite.com/paid/yourfile.pdf]http://www.yourwebsite.com/paid/yourfile.pdf[/url]). You could also insert a password to open the file and send the password to the paid customer. A JavaScript could be used to remove the password after it has been opened by the paid customer.
My favorite quote - "Success is the ability to go from one failure to another with no loss of enthusiasm.
My favorite quote - "Success is the ability to go from one failure to another with no loss of enthusiasm.