Surname declarations can 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 name (prefixing and appending a name to the married name) by one spouse
• Reassumption of the former name after dissolution of the marriage

For children:

• Naming of the mother with the consent of the non-custodial parent
• Naming by the mother and her husband
• Redetermination of the birth name after establishment of joint custody by the parents
• Declaration following a change of name by the parents or one of the parents
• First determination of a birth name after the birth of the child abroad

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

Name declarations are generally irrevocable.