Disputing & Establishing
Paternity in France

Initiating a paternity action is a major emotional and legal step. Our law firm assists and represents you in actions to challenge or annul inaccurate paternity recognitions. Practicing exclusively in family and filiation law, we ensure meticulous handling of these sensitive proceedings.

Statutory time limits for initiating a paternity contestation action differ depending on whether the disputed filiation is legally established by a valid birth certificate title (such as a birth certificate or family record book / livret de famille), or by factual continuous possession of status (possession d'état).

Establishing biological paternity often requires contesting a pre-existing legal filiation in parallel.

Possession of status (possession d'état) is a legal presumption: from known public facts (living together as family, treating the child publicly as one's own), the law presumes an unknown fact (paternity in the absence of a formal birth declaration):

Possession of status establishes the existence of a legal filiation bond between a parent and a child who act as such in reality, even in the absence of a biological tie. To be registered on the civil status records, possession of status must be officially certified in a notary's deed of notoriety (acte de notoriété).
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What Does a Summons to Contest Paternity Involve?

Contesting paternity is not about disowning one's family, but rather annulling an inaccurate legal paternity recognition (unlike adoption, which creates a new legal filiation bond).

The paternity contestation procedure aims to legally establish that the mother's husband or the author of the paternity recognition is not the child's true biological father.

This proof is established by biological evidence: a court-ordered genetic DNA test (test de paternité), which is a statutory right in filiation lawsuits and ordered by the Judicial Court.

What if You Already Obtained Private Commercial DNA Test Results?

Before commencing legal action, some individuals purchase DNA tests from foreign commercial websites (such as 23andme, DNA Center, or Easy DNA).

Under French law, conducting private DNA paternity tests outside a judicial proceeding is a criminal offense punishable by a €3,750 fine (Article 226-28-1 of the French Criminal Code).

Consequently, these private genetic test results are strictly inadmissible before French courts and cannot be submitted to the Judicial Court (Tribunal Judiciaire). Your attorney must request a judicially supervised DNA test carried out by accredited, court-sworn medical laboratories.

Under French law, this biological test is an absolute statutory right and cannot be refused by the judge unless there is a legitimate statutory impediment.

Who Can Initiate a Paternity Contestation Lawsuit?

A paternity contestation action is strictly reserved to the child, the mother, the registered legal father, or the person claiming to be the true biological father. In rare instances, the Public Prosecutor (ministère public) may also challenge fraudulent filiation.

What is the Statutory Deadline to Contest Paternity in France?

When filiation is established by birth title corroborated by actual possession of status (the husband is presumed father and has actually raised the child continuously), the contestation action must be brought within 5 years. After 5 continuous years of combined title and possession of status, paternity can no longer be challenged.

Conversely, if there is no possession of status (the registered father has never raised or acted as the child's father), paternity can be contested within 10 years from the date the filiation was officially registered. This 10-year limitation period is suspended during the child's minority.

What Are the Legal Consequences of Annulling Paternity?

Once the court contestation succeeds, the previous legal filiation is retroactively extinguished from the child's birth date.

The judge may, in exceptional circumstances, grant visitation rights to the man who raised the child, if deemed in the child's best interests.

Annulment of paternity automatically leads to a change of surname for minor children. For an adult child, their express consent is required to alter their surname.

Is a Lawyer Mandatory to Challenge Paternity?

Yes, representation by an attorney at law is mandatory for all filiation lawsuits before the Judicial Court (Tribunal Judiciaire).

Cost of a Paternity Action in France

Our firm provides transparent, fixed-fee retainer agreements for paternity proceedings. Full details are available on our legal fees page.

Establishing Biological Paternity (Action en Recherche de Paternité)

Once an inaccurate filiation is dismissed, the court can formally establish true biological filiation. Both actions (challenging false paternity and establishing true biological paternity) are typically filed concurrently by a father seeking legal recognition.

The Judicial Court rectifies the civil status register by removing the incorrect father and recording the biological father.

These procedures typically take between 12 to 24 months, primarily due to court scheduling and medical laboratory appointments for genetic testing.

By Claire Quétand-Finet Family & Divorce Lawyer - Versailles Bar Association

PhD in Private Law · +10 years of experience in family & divorce law · University Lecturer for continuous legal expertise

See also:
Child Custody Rights - Choosing an Experienced Family Lawyer - Adoption Lawyer in Versailles