1. First, the address and method of mailing must be determined according to the contents of the report.

2, anonymous letters can only be limited to ordinary letters, that is, ordinary letters!

As long as you don't write the address and name of the sender, the anonymous letter can be delivered.

Extended information 1. The post office is a communication department managed or directly operated by the state to deliver all kinds of mail (letters or articles), which has the characteristics of communicating officials, businessmen and the people.

2. The National Bureau, managed by the Ministry of Transport of the People's Republic of China, is an administrative organ of the country, which is completely different from the traditional post office (now China Post Group).

3. The State Post Bureau participates in international postal organizations on behalf of the country, handles intergovernmental postal affairs, formulates postal foreign cooperation and exchange policies and organizes their implementation, handles postal foreign affairs, manages the work involving Hong Kong, Macao and Taiwan according to regulations, undertakes postal supervision responsibilities, and promotes the establishment of a universal postal service system covering urban and rural areas.

References:

Baidu encyclopedia-anonymous letter