Hopefully this will help. I just recently got this to work without having to have users login.
Make sure that the PayPal plug-in configuration is set up with the correct email address of your PayPal account. This has to be a valid PayPal account email.
Also, make sure you are set to "live". Something that's easy to overlook during the switch from testing to real use! I know from experience.
And there needs to be a PayPal total entry on the form. Got caught on that one too.
I set up my Admin email to mail the PayPal completed transaction to the same email name as was used in the configuration. I can then view that email in-box to track if the transaction is completed successfully.
www.nemgtr.org/index.php?option=com_cont...d=206&Itemid=254
It could be better but it works for what we want to do.
Good Luck,
KA