A holographic will departs from the standard execution formalities most states require — typically two disinterested witnesses and, in some states, notarization — by relying instead on the testator's own handwriting as evidence of authenticity and intent. States that recognize holographic wills generally require that the material provisions, and sometimes the entire document, be in the testator's own handwriting, and that the document be signed, though the precise requirements (whether a date is required, how much of the document must be handwritten) vary considerably.

Not every state recognizes holographic wills at all; some accept them only if validly executed in a state that does recognize them and the testator later resides elsewhere, under general choice-of-law principles for wills. Where recognized, holographic wills are still subject to the same substantive contest grounds as formally witnessed wills — capacity, undue influence, fraud — but they carry an additional layer of risk because the absence of witnesses removes a common source of evidence about the testator's condition and intent at signing.

Because whether a given handwritten document even qualifies as a valid will is itself a threshold, jurisdiction-dependent question, Juricratic treats holographic-will validity as a gating dial that must resolve before any downstream distribution modeling proceeds, rather than assuming validity by default.

Probate attorneys presented with a handwritten document first confirm whether the governing state recognizes holographic wills and whether the document meets that state's specific handwriting and signature requirements, since a document that fails to qualify as a valid holographic will may instead be treated as no will at all, triggering intestate succession.