I need to send First and Last Name as separate fields to my payment gateway

Problem:

I  must send First Name and Last Name as separate fields to my payment gateway.

Solution:

In your cartit custom invoice you must use:
%io_logical_shopper_fname% and
%io_logical_shopper_lname% as the field names.

Technical Notes:

For more details please see the Real Time Payments section of the site.