1To report or notify an official organization or relevant party (often by filing a notice or form).
自転車が盗まれたので警察に届け出た。
My bicycle was stolen, so I reported it to the police.
引っ越したら住所変更を市役所に届け出る必要がある。
When you move, you need to notify the city office of your address change.
病欠の場合は学校に欠席を届け出てください。
If you are absent due to illness, please notify the school of your absence.