The notarization of household register refers to the notarization of personal household register to prove the authenticity and validity of household register information. It is commonly used in the following situations: 1. Study abroad: Many countries and schools require international students to provide notarized household registration as one of the application materials to prove personal identity and household registration information. 2. Immigration application: In some immigrant countries, the applicant needs to provide a notarized household register to prove his family relationship, marital status and children's information. 3. Employment application: Some employers or institutions may require job seekers to provide notarized household registration to verify their personal information and identity. 4. Marriage registration: In some countries or regions, if the married party is a foreign national, it may be necessary to provide a notarized household register as one of the documents