1. Electronic signature software: professional electronic signature software can be used to add electronic signature to electronic invoice, which can realize the authentication and authorization of electronic invoice;

2. Electronic signature service platform: register an account on the electronic signature service platform and use the electronic signature tool provided by the platform to sign and authenticate the electronic invoice;

3. Electronic authentication institutions: You can apply for electronic signature services from qualified electronic authentication institutions, and add electronic signatures to electronic invoices to realize authentication and authorization of electronic invoices.

The process of electronic invoice stamping is as follows:

1. Electronic signature software: professional electronic signature software can be used to add electronic signature to electronic invoice, which can realize the authentication and authorization of electronic invoice;

2. Electronic signature service platform: register an account on the electronic signature service platform and use the electronic signature tool provided by the platform to sign and authenticate the electronic invoice;

3. Electronic authentication institutions: You can apply for electronic signature services from qualified electronic authentication institutions, and add electronic signatures to electronic invoices to realize authentication and authorization of electronic invoices.

The information required for stamping the electronic invoice is as follows:

1, billing system account number: you need to apply for an account number in the billing system and provide relevant identity information;

2. Basic information of enterprise: Basic information of enterprise is required, including enterprise name and taxpayer identification number;

3. Invoice application materials: Invoice application materials are required, including invoice header, invoice type, invoice date, etc.

4. Electronic seal document: Electronic seal document is required, including seal certificate and seal password.

To sum up, the signature and authentication of electronic invoices is an important link to ensure their legitimacy and effectiveness, and must strictly abide by relevant laws, regulations and policy requirements.

I hope the above content can help you. Please consult a professional lawyer if you have any other questions.

Legal basis: Article 35 of the Measures for the Administration of Invoices in People's Republic of China (PRC).

In violation of the provisions of these measures, in any of the following circumstances, the tax authorities shall order it to make corrections and may impose a fine of 6,543,800 yuan; Illegal gains shall be confiscated:

(a) the invoice should be issued but not issued, or the invoice is not issued at one time according to the prescribed time limit, order and column, or the special invoice seal is not stamped;

(two) using the tax control device to issue invoices, and failing to submit the invoice data to the competent tax authorities on schedule;

(3) using non-tax-controlled electronic equipment to issue invoices, failing to report the software program description data used by non-tax-controlled electronic equipment to the competent tax authorities for the record, or failing to save and submit the invoice data in accordance with regulations;

(four) the use of invoices;

(5) Expanding the scope of use of invoices;

(6) Substituting other vouchers for invoices;

(7) Invoicing across specified areas;

(8) Failing to pay the cancellation invoices in accordance with the provisions;

(9) Failing to store and keep invoices in accordance with regulations.