Payment Gateway
Payment gateways are a system or an e-commerce application service provider service that can authorize payments for businesses, online retailers, stores, shops, service providers, consultants, online malls, or even the traditional brick and mortar businesses. It takes the place of a point of sale credit card terminal that can be found in most retail stores and businesses. The payment gateways will encrypt and transmit sensitive credit card information such as the credit card numbers, name, address, transaction number, and account id to make sure that the information passes securely between the customer and the ecommerce merchant.

ACH Check Processing
You can also get Internet payment gateways direct from the processor who  offer custom solutions like ACH, credit cards, debit cards, check processing, ID verification processing, and recurring payments.

Credit Card Fraud Detection
Most payment gateways provide some tools to verify or screen orders for fraud and can calculate sales tax amounts in nearly real time before the payment authorization request is sent to the payment processor. Some of the tools used to detect fraud or ID theft may include geolocation, finger printing, identity morphing detection, velocity pattern analysis, delivery address verification, and the basic checks for AVS.