Sigma Merchant Processing, LLC is a provider of electronic transaction processing services for merchants, Independent Sales Organizations (ISOs), Independent Sales Agents (ISAs), financial institutions, government agencies and multi-locations national corporations located throughout the United States. Sigma offers processing solutions for credit and debit cards, custom gift cards, electronic check
conversion and check guarantee, ATM Processing, full range of POS Systems for various businesses offering goods and services (including retail, restaurants, hospitality, health care, salon and spas, etc).