1. Mailing channels: There are many kinds of mailing channels, such as surface mail, registered mail, EMS, express delivery, etc. Ordinary mail is the most common mailing method, but its security and speed are not as good as other mailing methods. Registered mail is a safer mailing method than surface mail, which can track the status of mail and the mailing cost is not high. EMS and express delivery are relatively fast and safe mailing methods, but the mailing cost is relatively high. When choosing the mailing channel, we should choose the most suitable mailing method according to our own specific situation, considering the mailing cost, safety and speed comprehensively.
2. Mail safety: You should pay attention to mail safety. If the content of the report involves sensitive information, confidential information or information that causes retaliation, you can choose to send it by registered mail or EMS. These emails have tracking function, which can ensure the security of emails. In order to prevent the mail from being stolen or tampered with, you can also stamp the "sealed" sign on the envelope or add your own signature, date and other information on the envelope to ensure the authenticity and integrity of the mail.