判子

1. Origins, structure, and basic meaning

• Structure: 判子, read はんこ, denotes a personal seal stamped on documents for identification or authorization.
• Basic usage: It names a personal seal stamped in a document field and brought for an official procedure.

2. Common pitfalls and similar expressions

• A seal used for authentication
  • It is closer to a personal seal used to authenticate documents than to a decorative stamp.