The signing of the second child birth certificate refers to the need to fill in the signatures and identity information of two married people when handling the second child birth certificate. This requirement aims at ensuring the implementation of the family planning policy and preventing unnecessary population growth. When filling in the birth certificate, you need to provide marriage certificate, household registration book and other relevant documents to prove the applicant's marital status and home address.

When filling out the second child birth certificate, the applicant needs to provide marriage certificate, household registration book and other relevant documents, and fill in the identity information of the married parties. In addition, applicants need to provide information about their family members, such as the names, genders and birth dates of their spouses and children. This information will be used to verify the applicant's family status and the implementation of the family planning policy.

When filling out the second child birth certificate, both parties signed that they agreed to apply for the second child birth certificate and were willing to abide by the relevant policies and regulations. This kind of signature can ensure that the applicant's wishes are respected, and at the same time, it can also ensure the implementation of the family planning policy and the reasonable arrangement of family planning.