1. Industrial and commercial business license: A formal custodian institution must apply for an industrial and commercial business license before it can obtain legal business qualification. The industrial and commercial business license needs to be handled by the administrative department for industry and commerce, which is divided into original and duplicate. The materials to be prepared at the time of handling include the legal person's ID card and its copy, the house title certificate or lease agreement, and other documents required by national laws and regulations.

2. Tax registration certificate: A tax registration certificate is also essential to legally operate the custodian institution. Taxpayers shall apply to the local tax authorities for tax registration within 30 days from the date of obtaining the industrial and commercial business license. To apply for tax registration certificate, you need to bring business license, proof of business premises, relevant contracts, articles of association, agreements and other materials.

3. Fire safety certificate: In consideration of personal safety in the later period, the premises handled by the custodian institution shall not be put into use and opened for business without fire safety inspection, or the inspection does not meet the fire safety requirements. Therefore, before the formal operation, the custodian institution must apply to the relevant departments for legal and formal fire safety certificates.

4. Catering service license, hygiene license and health certificate: At present, many trust institutions will not only provide homework counseling services for children, but also provide catering services. Individuals who provide catering services naturally need to apply for relevant documents, including catering service license, hygiene license and health certificate.

5. Teacher qualification certificate: If it is a training school-style custodian institution, it will definitely recruit training instructors. In order to ensure good teaching results, these teachers usually have to obtain teacher qualification certificates. At present, off-campus trusteeship belongs to the category of domestic service, and it is necessary to apply to the industrial and commercial bureau for registration of business license. Trusteeship institutions are also supervised by health, education, public security police stations, public security fire departments and other departments according to their duties.

Trusteeship institutions, known as "small dining tables" in the early days, are places where children are fully cared for. Generally speaking, it is mainly to let children, such as kindergarten children and primary school students, do homework and play games with their children, and form good life and study habits through the supervision of teachers and the interaction of students.