Since 2013, all requests, communications and notifications or declarations between the professional association and the professional, as well as firms or service providers, with the exception of those related to disciplinary procedures, are carried out by electronic transmission of data, through the electronic single window, accessible through the website of the respective public professional association. Other relevant source is the Decree-Law 4/2015, the Code of Administrative Procedure (Código do Procedimento Administrativo), Adopted 07/04/2015, last modification 17/11/2020, Articles 61 and 62 (Link: https://dre.pt/dre/legislacao-consolidada/decreto-lei/2015-105602322).