1. Business license: it is the basic proof of the company's legal establishment and operation, including the company's name, type, legal representative, registered capital and other information;

2. tax registration certificate: it is the proof that the company pays taxes according to law, including taxpayer identification number, taxpayer name, taxpayer type and other information;

3. Organization code certificate: it is the proof of the organization of the company according to law, including the organization code, unit name, legal representative and other information;

4. copy of business license: it is a copy of the company's business license, which proves that the company is operating legally;

5. copy of tax registration certificate: it is a copy of the company's tax registration certificate, which proves that the company pays taxes according to law;

6. Copy of organization code certificate: it is a copy of the company's organization code certificate, which proves that the company has organized the organization according to law;

7. certificate of enterprise legal person: it is the proof of the company's legal person qualification and the identity and qualification of the company's legal representative;

8. Business license: it is the proof that the enterprise has obtained the business qualification of a specific industry, such as food business license and hygiene license;

9. ISO certification: it is the certificate that the company has passed the certification in quality management, environmental management and occupational health and safety management, such as ISO 91, ISO 141 and OHSAS 181.

Company qualification has an important influence on the operation and development of an enterprise, which is embodied in the following aspects:

1. Business scope: Company qualification determines the business scope of an enterprise, and different qualifications can enable enterprises to conduct business in different fields, thus affecting the market positioning and profitability of enterprises;

2. government supervision: company qualification is the government's recognition of the legality and compliance of enterprises, which has a certain regulatory role. If the enterprise does not have relevant qualifications or the qualifications do not meet the requirements, it may face government penalties and restrictions;

3. Business cooperation: Some enterprises or institutions may give priority to enterprises with relevant qualifications when cooperating with other enterprises, because this can make cooperation more smooth and stable and improve cooperation efficiency and quality;

4. Brand image: Company qualification is an important part of corporate brand image, and some enterprises with high-level qualifications are usually regarded as more formal, professional and trustworthy enterprises, which is conducive to enhancing the reputation and image of enterprises;

5. Management quality: The company's qualification requires enterprises to meet certain standards in management system, financial management and product quality, which can promote enterprises to establish a more standardized and scientific management model and improve management quality and efficiency.

to sum up, the qualification requirements and supporting documents of different companies may be different, and it is necessary to judge and apply according to the company's business scope, registered area, industry characteristics and other factors.

Legal basis:

Article 3 of the Regulations on Qualification Management of Construction Enterprises

Enterprises should apply for the qualification of construction enterprises according to their assets, main personnel, completed engineering achievements and technical equipment, and only after passing the examination can they engage in construction activities within the scope of qualification.

therefore, for some enterprises, it is necessary to have relevant qualifications before they can operate legally. Especially for construction enterprises, it is necessary to attach importance to qualifications, because only after having legal qualifications can they undertake related construction projects.