The main bank agreement is mainly about ensuring that a bank safeguards the contracting authority ́s need for secure and secure electronic payments (including payments from the Contracting Authority's bank accounts) and the accompanying services that are necessary to secure this payment facility. Such electronic payment transactions occur through use and transactions between the bank's computer systems and the Contracting Authority's finance/accounting systems. This type of service procurement mainly involves access to necessary bank systems and their use, but furthermore some use of human resources. This applies to employees and consultants connected to the bank, whose task is to operate/control and further develop necessary systems and services (reports/analyses, etc.).