What is the data privacy function of the credit card company that is responsible for handling credit card transactions for businesses globally?

Data processors are third-party service providers that handle data on behalf of data controllers. A data controller, or data owner, is an entity or person that collects and manages data. A data steward executes the data controller's directives and is tasked with managing the data. Data custodians are responsible for safeguarding, storing, and managing data entrusted to them.