Documentation Compliance Documents ACH Audit Attestation PCI Certificate of Validation (Attestation of Compliance) PCI Data Security Standard Service Providers Document Usio SOC Audit Electronic Billing and Payments Bill Pay Check File Layout Bill Pay API Billpay MCRPPS File Layout Usio Invoice Check Sample FTP Setup FTP Setup Guide API Documentation Usio Checkout API Usio Payment API 2.0 Usio Payment API 1.0 (Legacy) Usio Checkout for Android, iOS or iot Usio Statistics Reporting API Enrollment API Documentation Usio Pinless Response Codes and Specifications Usio ACH Return and NOC Codes Usio Credit Card Flat File Specifications ACH File Format Usio ACH CSV File Specifications Usio ACH Pending File Specifications Usio ACH Rejected File Specifications Usio ACH Returns and NOC File Specifications Usio ACH NACHA File Specifications Prepaid Platform Usio Card Services API Processing Schedule ACH, Billpay, Credit, ACH Settlement 3-day Chart Information Processing
