Polish Payment Standard (PSP) is a company formed by six biggest Polish banks: Alior Bank, Bank Millennium, Bank Zachodni WBK, mBank, ING Bank and PKO Bank Polski. PSP provides their customers with a revolutionary and intuitive mobile payment service -BLIK. BLIK enables customers to make eCommerce and retail payments, withdraw cash from ATMs and send transfers to other customers using the system. The PSP system, being a Polish payment scheme, means that the user can access the system using an app belonging to any of the participating banks, and can have several apps on their phone that will work with BLIK.