1. Confirm whether the token is correct: first, confirm whether the token is correct, including whether the format, length and digits of the token meet the requirements. If the token is incorrect, you need to regenerate or get the correct token.

2. Confirm whether the token has expired: If the token has expired, you need to regenerate or obtain a new token. Usually, tokens have a certain validity period and need to be regenerated or acquired after expiration.

3. Confirm whether the token has been tampered with: If the token has been tampered with, it may lead to the invalidation of the token. Therefore, it is necessary to confirm whether the token has been tampered with, and if it has been tampered with, it is necessary to regenerate or obtain a new token.

4. Confirm whether the application system supports tokens: If the application system does not support tokens, the tokens may be invalid. Therefore, it is necessary to confirm whether the application system supports tokens, and if not, the application system needs to be upgraded or replaced.

5. Contact customer service: If the above methods fail to solve the problem, you can contact the customer service staff of the electronic invoice platform for consultation and solution. Customer service staff will give corresponding solutions according to the specific situation.

There may be several reasons why the electronic invoice application token is invalid:

1.Token expired: the token of the electronic tax bureau has expired and cannot be used.

2. Electronic tax bureau system error: There is an error in the electronic tax bureau system, which makes the token unusable.

3. Browser incompatibility: The browser used is incompatible with the electronic tax bureau, which makes the token unusable.

4. Network connection problem: the network connection is unstable or disconnected, which makes the token unusable.

5. The token has been tampered with: the electronic invoice application token has been tampered with and cannot be used.

To sum up, the invalid electronic invoice application token means that the user's identity cannot be verified in the electronic invoice application, so the electronic invoice cannot be used for reimbursement, issuance and other operations. The emergence of this situation may cause troubles to users' financial work and may also affect the financial operation of enterprises. Users need to take some measures, such as reapplying for tokens, changing browsers, and checking network connections. These measures can effectively help users solve the problem of invalid electronic invoice application token and enable users to carry out financial work normally.

Legal basis:

People's Republic of China (PRC) electronic signature method

Article 20

When applying for an electronic signature certificate from an electronic certification service provider, an electronic signer shall provide true, complete and accurate information.

After receiving the application for electronic signature certificate, the electronic certification service provider shall check the identity of the applicant and review the relevant materials.