What is the statute protect an individual when somebody else open the mail?

The statute that protects individuals from unauthorized opening of their mail is primarily found in the U.S. Postal Service regulations under Title 18, Section 1702 of the U.S. Code. This law makes it a federal offense to knowingly open, or to cause to be opened, any mail that is not addressed to the individual without lawful authority. Violations can lead to criminal penalties, including fines and imprisonment. Additionally, individuals may also have civil recourse for damages resulting from such violations.