Tenn. R. Civ. P. 45.09
For purposes of issuance of any subpoena under Rule 45, the clerk of the court in which the action is pending may issue the subpoena in either written paper or electronic form. A signature affixed electronically to a subpoena shall be treated as an original signature. Payment for the issuance of an electronic subpoena shall be received by the trial court clerk not later than 10 calendar days after the issuance of the electronic subpoena and shall be paid by the party requesting said electronic issuance, subject to the following exception. If the requesting party is either a party who has been allowed to proceed on a pauper's oath or an attorney for such a party, then payment of the fee shall be taxed as a court cost.
Tenn. R. Civ. P. 45.09
Advisory Commission Comment [2022]
New Rule 45.09 is adopted to empower the trial court clerk to issue any Rule 45 subpoena by either written paper documents or electronic means.