This paper discusses the importance of preserving and keeping publicly available collections of government communication on official websites, as privileged spaces for dissemination and research on information of public interest in democracies. As a way of highlighting the theme, this article observes the government communication available on the official website of the Brazil presidency, produced during the government of former President Michel Temer (2016-2018) and former President Dilma Rousseff (2010-2016) in order to discuss the impacts of preservation and erasure of government communication on the political memory of the country. The approach is linked to the Digital Democracy and the theoretical perspectives of the Digital Humanities, specially about registration, erasure and political memory on the internet.