What is the process called for administering an estate with property located in another jurisdiction?

The process of administering an estate that includes property situated in a jurisdiction different from where the deceased person resided is known as obtaining a grant of ancillary administration. This is necessary because the laws governing estate administration vary from one jurisdiction to another. Therefore, if real or personal property belongs to the deceased in a different jurisdiction, the executor or administrator must often seek permission from that jurisdiction's probate court to manage and distribute the out-of-state assets. This is called ancillary administration, which supplements the primary probate proceedings taking place in the decedent's home jurisdiction.

In contrast, filing a federal estate tax return pertains to tax obligations rather than the probate process, and does not directly address estate administration across jurisdictions. Using a proxy trustee is related to appointing another person to act on behalf of the trustee but does not involve the specific legal mechanism needed for handling out-of-state property. Creating a joint tenancy concerns property ownership rather than the administration of an estate, and it's not relevant to the process of managing an estate that includes multi-jurisdictional assets.