届け出

1. Origins, structure, and basic meaning

• Structure: In 届け出 (とどけで), notification 届け and submission 出 combine to denote an official filing.
• Basic usage: 届け出 is an official notification to an authority or institution, or the filing procedure itself.

2. Common pitfalls and similar expressions

• Official notification or filing
  • It differs from an informal personal message, and 届け出の can modify a deadline, document, or method.