10-20-2014 11:52 AM - edited 10-20-2014 11:55 AM
There isn't a field that determines CNP or CP, it the account that you have with authorize.net.
What do you mean the extra fields are from? isn't it listed on the pdf doc?
Some are blank(saved for future use), so don't map those, just follow the index on the pdf
Like RichardH said, you could use the XML verison, then everything will be in a node.
10-20-2014 12:13 PM
The current AIM NVP guide indicates there will be 68 fields returned (assuming you're using V3.1), however those above 55 are not yet defined.