How Swiss citizenship by descent works
The eligibility rules for Swiss citizenship by descent, in plain English — who may qualify, what disqualifies, and the legal regimes over time, each cited to its primary statute.
Who may qualify
A qualifying path — via the jure sanguinis route
Date keying
- Applies to people born on or after 1985-07-01 (regime selected by birth date, not by when the case is assessed).
Requirements
ALL of the following
Must NOT be true
the applicant's link to the qualifying ancestor is by adoption (rather than by birth).
- tie is adoptive:
- yes
the applicant must be the parent of the qualifying ancestor.
- relationship:
- parent
the qualifying ancestor must have held swiss citizenship at the moment the applicant was born, passing it down the line by descent.
- required citizenship:
- swiss
ANY of the following
This rule applies to people born on or after 1985-07-01 (it selects a legal regime by the applicant's birth date, not by when the case is assessed).
- birth-date regime boundary:
- 1985-07-01
- comparison:
- born on or after
the applicant has a qualifying ch pre 1985 transmission confirmed (value).
- value:
- true
This rule applies the "p12_age_forfeit" check (no plain-English template is registered for it yet).
Primary sources
- § Swiss Citizenship Act (BüG) of 20 June 2014 (in force 1 Jan 2018), Art. 1 — jus sanguinis, parent-to-child only [CH-FEDLEX]
- § Swiss Citizenship Act (BüG), Art. 7 — age-25 forfeit for ALL dual nationals born abroad (second generation and beyond, not only third generation); loss cascades to subsequently-born children via P1 returning FALSE when the parent's Swiss citizenship was already forfeited [CH-SEM, CH-SWI]
- § Pre-1 July 1985 maternal-line restriction (1952 Act): a married Swiss mother could not transmit to children born during the marriage; equalised prospectively by the 14 Dec 1984 amendment. Gated via pre_1985_line_confirmed; the cohort's live remedy is Art. 51 BüG simplified naturalization [CH-02]
A qualifying path — via the jure sanguinis route
Requirements
ALL of the following
the applicant has a qualifying adoption (was finalized). If this fact is absent, the rule treats it as not applying (rather than asking for more information).
- was finalized:
- true
Citizenship must have passed to the applicant through a finalized adoption, with the adoptive parent holding swiss citizenship at the time of the adoption, and the adoption finalized before the applicant turned 18.
- required citizenship:
- swiss
- adoption before age:
- 18
Primary sources
- § Swiss Citizenship Act (BüG 141.0), Art. 4 — a minor foreign child adopted by a Swiss citizen acquires Swiss citizenship as if from birth (full-status adoption, adoptee under 18 at adoption) [CH-FEDLEX]
See how these rules apply to your family
The free eligibility check walks your own lineage through these rules — no account, no card, about two minutes.
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