by Jason Martinez.
Hello Maurizio, Sorry for the late response. I was out all last week.
I ended up not using it. It appeared to work, but didn't quite play with my moodle site. They even have a developers sandbox to test against your moodle site with, but it didn't quite work for me.
It is a plugin you need to download from moodle.org. If you have an older version of moodle (like 1.9 up to 2.2) I think the authorize.net plugin may work. Then There is always the PayPal plugin that is built into moodle 2.6.
Sorry I could not be of more help.
Jason
-It's the small things that make the difference