Short answer. Once the court issues its order directing the rival claimants to interplead, Rule 62, Section 3 requires summons to be served on each of those conflicting claimants, together with a copy of the complaint and a copy of the order itself, formally bringing every claimant into the single proceeding where their competing claims will be resolved.
What the law says
Summons shall be served upon the conflicting claimants, together with a copy of the complaint and order.
Rule 62, Section 3 — Summons. Read the full provision →
A short but purposeful section
Rule 62, Section 3 is brief, but it fills a necessary procedural gap: after the court issues its order requiring the conflicting claimants to interplead under Section 2, this section specifies exactly what must be served on them to formally bring each claimant into the case as a party bound by whatever the court eventually decides about the disputed property.
Three documents travel together
The section requires summons to be served together with two other documents: a copy of the complaint, and a copy of the order itself. Serving all three together ensures each claimant understands not just that they are being sued, but also the substance of the dispute and the specific court directive requiring them to interplead, rather than receiving a bare summons with no context for why they are being brought into the case. A claimant residing outside the country, or one whose whereabouts are unknown, is not exempt from this requirement; the stakeholder simply has to pursue whichever mode of service the Rules otherwise make available for reaching that particular claimant.
Why bundling matters
Because interpleader depends on getting all the rival claimants properly before the court at the same time, complete and proper service of these three items is what actually gives the court jurisdiction over each claimant and starts the clock on their obligations to respond, addressed in the sections that follow. Incomplete service on any one claimant risks leaving that claimant outside the court's jurisdiction and unbound by the eventual judgment.
What claimants do once properly served
Being properly served with the summons, complaint, and order is what obligates each rival claimant to respond and assert their claim within the case, rather than pursuing it separately against the stakeholder. A claimant who is not properly served with all three documents can later challenge whether the court ever actually acquired jurisdiction over them, which is exactly why the rule bundles the three together rather than leaving service to a bare summons alone. The section does not address what happens after service is completed; once properly served, each claimant is expected to respond within the case in the ordinary manner a defendant would, rather than being given some separate, interpleader-specific procedure for asserting their claim to the disputed property.