Causes of insufficient credit card balance:

1. The available credit limit is less than the amount paid.

2. Overdue repayment causes the bank to freeze the credit card account, and an insufficient balance will be displayed. As long as there is an overdue payment, the bank has the right to freeze the credit card.

3. When the repayment limit has not been restored, a prompt will be given that the balance is insufficient. Only when the payment is received can the limit be restored to the same as before.

In most cases, citizens who have full capacity for civil conduct (citizens over 18 years old in mainland China) and have certain direct financial resources can apply for a credit card from the card issuing bank. Sometimes, legal persons can also serve as applicants

Those who apply for credit cards can be divided into units and individuals. Applicants should be institutions, enterprises and business units, foreign-funded enterprises and individual industrial and commercial households with independent legal person status in my country. Each unit applying for a credit card can receive a main card and multiple (5-10) supplementary cards as needed.

Individuals applying for credit cards must have a fixed occupation and a stable source of income, and provide a guarantee to the bank. The forms of guarantee include personal guarantee, unit guarantee and personal capital guarantee.

The application method is generally by filling in a credit card application form. The content of the application form generally includes the name of the applicant, basic information, economic status or source of income, guarantor and his/her basic information, etc. And submit certain copies of documents and certificates to the card issuing bank.

After the customer fills in the application form truthfully, he or she must also submit relevant credit certificates while submitting the completed application form. The application form is accompanied by a credit card use contract. The applicant authorizes the card-issuing bank or relevant departments to investigate its relevant information, and submits a statement of the authenticity of the information, the card-issuing bank's privacy protection policy, etc., and must have the applicant's signature.

After receiving the application form and relevant materials from the applicant, the card-issuing bank must review the applicant's creditworthiness. The content of the review mainly includes whether the content of the application form is true. The creditworthiness of the applying unit must be evaluated, and the relevant circumstances of the guarantor must also be reviewed for individuals.

Usually, banks will judge whether to issue a credit card to the applicant based on the application information and various aspects of the applicant's information and financial situation. Factors considered include the applicant's past credit record, the applicant's known assets, professional characteristics, etc.

The specific factors and processes reviewed by the card issuing bank are commercial secrets and are generally difficult for outsiders to understand. The standards of each card-issuing bank are also different. Therefore, the same materials may be issued with different credit limits and different types of credit cards in different banks. Some banks may even approve the application, while others may reject it. .