Below are links to valulable information that existing MPS Merchants can view and/or download. 

Add American Express to MPS

AVImark README 2009.0

CMS Online Reporting

Modify Bank Account Used by MPS

MPS Address Change Form

MPS Configuration Instructions

MPS Connection Check Utility

MPS Hardware Return, Repair, or Replacement Policy

MPS Merchant Updating Instructions

MPS PA-DSS Implementation Guide

MPS Processing Terms and Conditions

MPS Usage Instructions

PCI DSS Compliance Option Program

Remove American Express from MPS