10.3 and 3.1 Credit Card Error: Invalid source for processing script.
Problem
After swiping a credit card and acknowledging the amount by clicking yes, response is:
Transaction Was Not Authorized... Reason: Invalid source for processing script.
Same error also presented during an Installment Billing run, when customer got 10 declines in a row with this response:
Invalid source for processing script.
Solution
This error is the result of a bad conifguration setting in Plug'nPay.
1 Login to the Plug'nPay Admin site.
2 Navigate to Security Administration > Transaction Security Configuration > Security Requirements.
3 In the section labeled 'Disable Payment Interfaces', make sure that all the check boxes are cleared.
4 PlugNPay recommends requiring an IP Address (API/XML only) match as well, which requires that your organization's external and client IP addresses to be added to the IP Addresses list on this page.