Against the law to open someone else's mail

In most countries, it is illegal to open someone else's mail without their permission. This is considered a violation of their privacy and is often punishable by law.

In the United States, for example, the United States Postal Service (USPS) has strict regulations regarding the opening of mail. According to the USPS, it is illegal to open or tamper with someone else's mail, and doing so can result in criminal charges.

The USPS is authorized by the United States Code to regulate the opening of mail, and it is illegal to open or tamper with mail that is not addressed to you or that you do not have permission to open. This includes opening mail that is addressed to someone else, even if you are a family member or roommate.

In addition to the USPS regulations, many states have their own laws that prohibit the opening of someone else's mail. For example, in California, it is illegal to open or tamper with someone else's mail, and doing so can result in a misdemeanor charge.

In Canada, the Canada Post Corporation has similar regulations regarding the opening of mail. According to Canada Post, it is illegal to open or tamper with someone else's mail, and doing so can result in criminal charges.

In the United Kingdom, the Royal Mail has similar regulations regarding the opening of mail. According to the Royal Mail, it is illegal to open or tamper with someone else's mail, and doing so can result in criminal charges.

It's important to note that there may be some exceptions to these laws, such as in cases where a person has given you permission to open their mail or in cases where the mail is being opened for a legitimate purpose, such as for law enforcement or postal inspection purposes. However, in general, it is illegal to open someone else's mail without their permission.