Did you lose an item for which you have insurance? Some insurance companies may ask you to report a loss when submitting a claim. Via iLost you can report the loss of your lost property.
First check iLost.co to see if your item has already been found.
You can fill in the form and print it. Subsequently you can bring the form to the local council to stamp it. Please note not every insurance company requires a stamp of the local council. Also not every local council is willing to provide a stamp. Therefore, please first verify with your insurance company and your local council what the requirements are.