The merchant agreement is the entirety of the agreement between a merchant and an acquirer and spells out in great detail the responsibilities, rights and warranties involved in the relationship. When written properly, the merchant agreement covers all possibilities and eventualities and covers all aspects of the relationship between the two parties.
UniPay Gateway: Open Source Payment Gateway
How to Choose the Best Payment Solution
How to Own a Payment Gateway
What is a Payment Gateway
What is Recurring Billing?
How Payments Work
What Should an Ideal Payment Platform for Investors Look Like?