Summary

O'Callaghan v. O'Brien — Opinion of the Court

Thus, if a state law provides for any form of notice on an application to probate a will, and authorizes a contest before the admission of the writing to probate, then it would follow, if the words 'suit or action of inter partes' embraces such a contest, the proof of wills, if contested by a citizen of another state or alien, would be cognizable in the courts of the United States, and hence not under the exclusive control of the state probate court.
Source: Wikisource

O'Callaghan v. O'Brien — Opinion of the Court

We think also the claim of the want of due process of law arising from the contention that, in the state of Washington, a nuncupative will does not pass title to real estate, and therefore a violation of the due process clause of the 14th Amendment would arise if the probate court acted upon the contrary assumption, was clearly devoid of all reasonable foundation. It is not denied that, under the law of Washington, in cases of intestacy as well as of testacy, both real and personal property is taken into the control of and is administered by the probate court.
Source: Wikisource

O'Callaghan v. O'Brien — Opinion of the Court

We are of opinion that the sections in question authorize a proceeding for contest only before the court which has admitted the will to probate or rejected the application made for probate, and that the authority thus conferred concerning the contest is an essential part of the probate procedure created by the laws of Washington, and does not, therefore, cause a contest, when filed, to become an ordinary suit between parties.
Source: Wikisource

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