You are required to file a declaration of birth with the registrar of civil status within 30 days of your child's birth, along with a copy of the attestation of birth.
Based on the information contained in the attestation of birth and declaration of birth, the registrar of civil status will register your child’s birth in the Québec register of civil status and draw up the child’s act of birth.
Late declaration
If the declaration of birth is not filed with the registrar of civil status within 30 days, it is possible to file a late declaration, in which case the registrar will make a summary investigation and draw up the act of civil status on the basis on the information obtained.
If a late declaration is filed for a child for whom a declaration has already been made, and does not contradict the initial declaration, any change made to the act of civil status will be conditional on:
- the consent of the parent who filed the initial declaration,
- the consent of the child, if 14 years of age or older,
- the absence of a relationship of filiation established with another person, and
- the absence of any objection by a third person.
Publication of notices of notices of tardy declaration of filiation
Please note that notices of tardy declaration of filiation must be published on the website of the registrar of civil status 
, rather than in the Gazette officielle du Québec and in a local newspaper.
Last update: July 13, 2023
