Can a non US citizen serve a subpoena?

Yes, a non-U.S. citizen can serve a subpoena, but the rules governing service may vary depending on the jurisdiction and the specific circumstances of the case. Generally, service of process, including subpoenas, must comply with local laws and court rules, which may require that the server be a competent adult or a licensed process server. Additionally, in some cases, the courts may have specific requirements regarding who can serve legal documents. It's often advisable to consult legal counsel to ensure compliance with relevant regulations.