# Modification of a substantive error

In this case, the substantive content of the ECS is inaccurate and does not correspond to the reality (notably regarding the identification of property or persons, the shares for the heirs, etc.)

The modification may be made at the request of any person demonstrating a legitimate interest.

The issuing authority will then establish a new ECS. If the authority has ceased its professional activity, the ECS may be established by any other competent authority.