Short answer. Through the officer who manages the jail or institution where the defendant is confined; that officer acts as a special sheriff for this specific purpose. The jail warden must then file a return within five calendar days from serving the summons on the confined defendant.

What the law says

When the defendant is a prisoner confined in a jail or institution, service shall be effected upon him or her by the officer having the management of such jail or institution who is deemed as a special sheriff for said purpose. The jail warden shall file a return within five calendar days from service of summons to the defendant.

Rule 14, Section 8 — Service upon prisoners. Read the full provision →

A dedicated channel for confined defendants

A defendant who is a prisoner confined in a jail or institution cannot simply be handed a summons by an ordinary outside sheriff walking in as freely as one would with a defendant who is at large in the community. This rule routes service through the officer having management of that jail or institution instead, recognizing the practical realities of a correctional setting.

The 'special sheriff' designation

That managing officer is deemed a special sheriff for the specific and limited purpose of effecting service of summons on the confined defendant. This designation gives the jail or institution's own official the same procedural role and legal authority a regular sheriff from the court would otherwise have, tailored specifically to the confined setting where the defendant happens to be held.

The five-day return requirement

After service on the prisoner is actually effected, the jail warden is required to file a return with the court within five calendar days from that service of summons on the defendant. The return is what documents to the court that service was in fact made and precisely when, and it must be filed within that specific short window rather than left open-ended indefinitely.

Why this matters procedurally

Because a prisoner-defendant's freedom of movement and communication is inherently restricted by their confinement, routing service through the jail administration in this way ensures summons still genuinely reaches such a defendant, and that the case record reflects that fact promptly through the warden's timely return, rather than leaving service on incarcerated defendants unresolved or awkwardly improvised in every case that comes up.

What happens if the warden misses the five-day window

The rule sets a firm outer limit for the return, but it does not itself void service simply because the warden was late in filing it — the return documents that service already happened, rather than being the act that completes service in the first place. A plaintiff whose case is delayed by a late return may still bring the delay to the court's attention, since a missing or overdue return can leave the record unclear about whether and when the confined defendant was actually served.

Related provisions

Note. Statute text quoted on this page is reproduced from the official enactment and is linked to the full provision. The explanation around it is general legal information from Vivas & Nobles Law Office, not legal advice. Whether it applies to your situation depends on facts only a lawyer reviewing them can assess.