CF, Modernizzazione del diritto di famiglia, Rapp. Post. Fehr (12.3607), 2015-03, pag. 26, cpv. 4.4.6 ([Internet, 2021-05-31](https://www.google.com/search?q=%22modello+opt-put%22+site%3Aadmin.ch&client=firefox-b-e&ei=L_20YKbjBpGTkwXap4OYCQ&oq=%22modello+opt-put%22+site%3Aadmin.ch&gs_lcp=Cgdnd3Mtd2l6EAM6BwgAEEcQsAM6BwghEAoQoAFQmGJY4nVgy3loAXABeACAAZgBiAHRCpIBAzkuNpgBAKABAaoBB2d3cy13aXrIAQjAAQE&sclient=gws-wiz&ved=0ahUKEwjmtqDimvTwAhWRyaQKHdrTAJMQ4dUDCA0&uact=5))