In general, a complaint letter must be signed. Asking the petitioner to sign the Acceptance Form of Petition Matters is the working procedure requirement of the petition department, which means that the petitioner's petition demand has been received, which is equivalent to the petition department filing a case and entering the investigation stage.

Letters and visits refer to the system in which individuals or groups of citizens contact the institutions or personnel responsible for letters and visits in various forms, such as letters, emails, visits, telephone calls, faxes and short messages. , thus reflecting the situation, expressing opinions and calling for a solution. Relevant institutions or personnel responsible for letters and visits shall be dealt with in a certain way.