Third District Applies General Agency Principals to Issue of Who is Real Party in Interest A quick glance at any court docket these days will reveal that many foreclosure actions are being prosecuted by someone other than the real party in interest. While it is generally acceptable for an authorized agent to bring a lawsuit on behalf of a principal in a civil action, how and to what extent is this rule recognized in the probate arena? Generally, in actions by or against a probate estate, the personal representative of the estate is a necessary and indispensable party. There is a lot of decisional case law in Florida holding that in cases involving claims made by or against an estate, the estate and its survivors are the real parties in interest, and the personal representative is merely a nominal party.