If the application form for joining the Party is filled in incorrectly, it will not be approved and will be returned to be filled in again. Filling in the "Application Form for Joining the Communist Party of China" based on relevant public information inquiries is one of the necessary procedures for joining the party specified in the "Constitution of the Communist Party of China". As an important certification document that applicants must fill in, it is the basis for the party organization to review comrades who are about to join the party. At the same time, it is an important document that faithfully records the party organization’s review and approval process for party membership applicants. Legal basis: Article 37 of the "Details of the Communist Party of China for the Development of Party Members". After a probationary party member becomes a regular member, the party branch shall promptly submit his "Application for Party Membership to the Communist Party of China", application form for joining the Party, political review materials, The application form for regularization and training and education inspection materials shall be submitted to the Party Committee for storage in personal personnel files. If there is no personnel file, a party member file will be established and kept by the party committee or the organizational department of the county-level party committee.