Acknowledgement of co-motherhood

If you have a child with a woman you are not married to, you can register co-motherhood of the child using the ‘Acknowledgement of co-motherhood’ form. With twins, you should complete one form for each child.

You should use this form if the mother of the child has been in another registered partnership without being separate up to 10 months before the child’s birth.

Acknowledgement of co-motherhood implies joint parental responsibility in the following situations:

  • The parents have or have had the same registered address for 10 months before the child’s birth.
  • The parents have been married for 10 months prior to the child’s birth (in other words, they were divorced before the child’s birth).
  • The parents were separated at the time of the child’s birth.

How to

Complete and sign the application with NemID and send it digitally.

You should have the following documents ready when you complete the form:

  • CPR number and email address for the mother.
  • Either ‘Samtykke og erklæring om faderskab eller medmoderskab ved assisteret reproduktion (børnelovens §§ 27 og 27 b)’ [Consent and declaration of fatherhood or co-motherhood by IVF (the Children’s Act, Sections 27 and 27b)] or ‘Samtykke og erklæring om faderskab eller medmoderskab ved assisteret reproduktion (børnelovens § 27 a, stk. 1 og 2)’ [Consent and declaration of fatherhood or co-motherhood by IVF (the Children’s Act, Sections 27 a (1) and (2))]. You can find these forms here: Samtykkeerklæringer
  • If one, or both of you was born before 1960 or in another country: birth and baptism certificates or similar documentation.
  • If the mother’s civil status was changed by the authorities in another country: certificate or similar documentation.

If you use the paper form, it is important that you get someone to witness that your signature is genuine and the date is correct. You should therefore sign it the same day in the presence of your witness.

The child’s mother may not be a witness.