You cannot take the surname of your partner.
Each member of the couple must complete their own tax declaration individually.
If your partner purchases property in their name, you have no rights to it.
If you separate, you are not entitled to maintenance payments, even if you have reduced or given up gainful employment during your partnership in order to look after the joint children or the household.
If you separate, you have no entitlement to OASI (AHV/AVS) contributions paid by your partner during your cohabitation.
Neither partner is subject to a legal obligation to help the other partner (as in the event of illness) or to support the other partner. In some cases, however, the financial situation of one partner does have an influence (e.g. as far as social assistance and enforcement proceedings are concerned).
Each partner will receive a full OASI pension upon retirement, unlike married couples or registered partners who are only entitled to a shared pension equal to 150% of a full pension[BTFB2] .