Invoicing app

This application is made for Creative Companies Association of Moldova(https://cor.md/). The customer needed an application that allows invoices for membership in the association to be issued to member companies. After payment, the application sends them certificates confirming their membership in the association until the end of the current year. Thus, the company invoices 61 members of the association every year using this application and receives about 610000 MDL (~35000$).