Legal analysis: the so-called litigation volume is the file transferred by the investigation organ to the procuratorial organ to enter the litigation procedure. For example, documents requesting approval of arrest; After investigation, the file was transferred to the prosecution section of the procuratorate. The litigation volume includes two parts: one is the document volume. Including all kinds of legal documents and appraisal materials required for litigation. Second, the amount of evidence. There is all kinds of evidence. The investigation volume is the file kept by the investigation organ itself, which we call the secondary volume. There are two kinds of it. First, the investigation organ keeps the files of cases that cannot be completed through investigation. For example, files released from criminal detention, files that do not need to be investigated because the procuratorate does not approve the arrest and release; Two, after the completion of the lawsuit, a copy of the case file shall be retained by the investigation organ. Including all kinds of internal submission documents of compulsory measures, materials backed up for continuing investigation, report outline of the case during investigation, marking notes, interrogation outline, investigation outline, etc.
Legal basis: Article 35 of the Notary Law of People's Republic of China (PRC). The notary office shall classify and file notarized documents. Important notarization files such as matters that should be notarized according to laws and administrative regulations shall be handed over to the local archives for safekeeping after the expiration of the preservation period of the notarization institution.