Declarations regarding surnames may be made in the following cases, among others:

For spouses:

• Subsequent determination of a married name, e.g., after marriage abroad
• Declaration of a double surname (prefixing or suffixing a name to the married name) by one spouse
• Reassumption of the former surname following the dissolution of the marriage

For children:

• Assignment of a name by the mother with the consent of the parent who does not have custody
• Assignment of a name by the mother and her husband
• Redefinition of the birth name following the establishment of joint custody by the parents
• Declaration of adoption of a name change by both parents or one parent
• Initial determination of a birth name following the child’s birth abroad

Whether and in what form a name declaration or name change is possible in a given case must be determined on a case-by-case basis by the competent authority.

Declarations regarding a child’s name are generally irrevocable.