Monday–Friday, 7:00 a.m.-5:00 p.m. CST
Fill out our support request form
For general helpdesk inquiries, complete our support request form and we will get back to you within 4 business hours.
Urgent Technical Support
If you are experiencing technical issues processing transactions after Rubix business hours call NPC or CardConnect directly and have your merchant ID ready.
NPC Customers: (800) 683-2289.
CardConnect Customers: (877) 828-0720.
Payment Industry Questions
Browse the NPC Support Video Library, for EMV Help, Terminal & Hardware Support, Servicing & Training, Chargebacks & Disputes, and Common Questions.