What is deemed valid service of a subpoena when sent by certified mail?

When a subpoena is sent by certified mail, the receipt of the certified letter is the key element that establishes valid service. This receipt serves as proof that the subpoena was mailed to the intended recipient and acknowledges the date of mailing. It is a critical piece of documentation that demonstrates the process server has followed the proper protocol for notifying the addressee about the requirement to appear or provide documents.

In the context of legal procedures, having this receipt provides verifiable evidence that the service was executed, thereby fulfilling jurisdictional and procedural requirements for the court. This means that the party who needs to comply with the subpoena has been properly informed, and the court can enforce the order that's been served.

While the addressee’s signature would indeed signify acceptance of the mail, the mere act of signing does not apply to all instances of service by certified mail, as not all jurisdictions mandate a signature for valid service. Email confirmation does not hold legal weight for service requirements in this scenario. Finally, the return of the original letter does not pertain to certified mail processes, as the process server is concerned with the receipt of the certified mailing rather than the letter returned to them. Thus, the receipt of the certified letter is the definitive proof of service.