Canonum De Ius Virtus Naturae
Canons of Bioethics Law
II. Life
2.3 Reproduction
Article 44 - Sperm Conveyance
Canon 4864 (link)
A Sperm Donor is the biological father of every infant produced through the use of his sperm. However, in accordance with the nature of Sperm Conveyance can never be regarded as the legal father.
Canon 4865 (link)
As a Homo Sapien Sperm Donor cedes all legal rights and parenting rights upon such a donation, as a general rule all Sperm Donors should remain anonymous.