Swiss Civil Code

¹ The ad­opt­ive par­ents must in­form the child of his or her ad­op­tion when his or her age or ma­tur­ity per­mits.

² A minor is en­titled to in­form­a­tion about his or her bio­lo­gic­al par­ents, provided it is not pos­sible to draw con­clu­sions about their iden­tity. The child shall be giv­en identi­fy­ing in­form­a­tion only if he or she can show an in­terest worthy of pro­tec­tion.

³An adult child may at any time re­quest that the per­son­al de­tails of his or her bio­lo­gic­al par­ents and fur­ther in­form­a­tion about them be dis­closed to him or her. The adult child may also request that information about the direct descendants of his or her biological parents be disclosed to him or her if the descendants are of age and have consented to the disclosure.