What type of issue could involve tampering with mail contents?

Opening mail refers to the act of accessing the contents of a letter or package without the permission of the sender or the intended recipient. This is a significant concern in postal services because it can lead to potential breaches of privacy, theft of sensitive information or valuables, and loss of trust in the mail delivery system.

Tampering with mail typically involves unauthorized access to its contents, which is fully encapsulated by the term "opening." Such actions can violate various laws and regulations governing the integrity of mail, as well as the private rights of individuals and organizations. It is crucial for postal employees and the public to be aware of these potential issues to help maintain the security and confidentiality of mail.

Other options such as destruction, delivery, or sanitation, while relevant to mail handling, do not specifically emphasize the act of unauthorized access to the contents, which is the essence of tampering. Destruction discusses damaging mail without specifying tampering with its contents, delivery pertains to the process of bringing mail to its destination, and sanitation focuses on cleaning or health-related measures, none of which align directly with the act of opening mail.