Can a summons be left in a mailbox?

In general, a summons cannot be legally served by leaving it in a mailbox. Most jurisdictions require that a summons be personally delivered to the individual being served or delivered in a manner that complies with local rules of service, such as certified mail or through a process server. Leaving a summons in a mailbox may not fulfill the legal requirements for proper service and could lead to complications in a court case. Always check local laws for specific regulations regarding service of process.