6.6.2024 | The Firearms Act also requires the registration, i.e. reporting to the police, of firearms that have been rendered permanently unfit for use or deactivated. The deadline for notification is 15 July 2024. The registration obligation is based on improving weapon safety. Notification can be submitted electronically or by visiting a police station. It is advisable to report the firearm in good time, as an undeclared firearm may result in a fine.
https://poliisi.fi/en/-/firearms-rendered-unfit-for-use-must-be-registered-by-15-july-2024