Notifications of marriage ceremonies are received from heads of religious associations or their representatives, priests or district commissioners to be registered in the National Registry. If a marriage takes place abroad, an original copy of the marriage certificate must be submitted to Registers Iceland. See: Document requirements
Notifications of a legal separation and final divorce are received from district commissioners or courts of law. If a legal separation or final divorce is finalized abroad, an original copy of the relevant documents must be submitted to Registers Iceland. See: Document requirements.
People who live together and have the same legal domicile but who are not married or who have an undeclared marital status can register their cohabitation. Pursuant to law, the date of registration in the National Registry is always based on the reception of the dated request. Foreign nationals with an undeclared marital status cannot be registered for cohabitation. In order to register people with an undeclared marital status for cohabitation, the person in question must identify their marital status with relevant documents, e.g. a marital status certificate from the person’s home country. Foreign marital status certificates may not be older than 6 months. See: Document requirements.
There are no comprehensive laws on registered cohabitation in the National Registry, and the rights of persons in cohabitation depend on the circumstances in each case. Registration of cohabitation has an effect on factors such as the registration of paternity and custody of children in the National Registry. See: Custody and registration of parents
If persons who are registered as cohabiting in the National Registry move to different legal domiciles by notifying a change of address, the cohabitation ends automatically. However, if these persons have one or more children, they are obliged to determine the custody of the child or children before the end of cohabitation and change of legal domicile. The parties must contact a district commissioner to arrange an agreement on the custody and legal domicile of the child or children. The district commissioner sends a confirmed agreement to Registers Iceland to record the end of cohabitation, change the legal domicile if necessary and record the decision on the custody of the child or children.
Further details are available on the District Commissioners’ website (only Icelandic)
Persons who wish to change their registration in the National Registry from a registered partnership to marriage can do so by submitting a request to that effect, signed by both parties. No special form has to be filled out.
Note that registered cohabitation and registered partnership is not the same thing. Registered partnership applies to same-sex couples who were not legally allowed to marry but could instead have their partnership registered.