Do you need the signature of your family after the approval of the necessity of detention?
No need. The public security organ shall, according to the relevant public information, fill in the Report on Detention of Letters and Visits and report it to the person in charge of the public security organ at or above the county level for approval. When carrying out detention, the detainee needs to sign the detention certificate, but does not need the signature of his family. Custody is the temporary detention of criminal suspects by judicial organs before the final judgment.