What the rule says
Pennsylvania's will-execution rule is unusual among American states. Under 20 Pa.C.S. § 2502, a valid Pennsylvania will requires only two elements at execution:
1. A writing. The will must be in writing. 2. The testator's signature at the end. The will must be signed by the testator at the end of the document.
Witnesses are not required at execution for an ordinary signed will. Most states require two witnesses to be present and to sign at the time the will is executed; Pennsylvania does not.
Witnesses are required only in two specific scenarios:
- The testator signs by mark. If the testator signs by an X or other mark rather than a full signature, the mark must be made in the presence of two witnesses who must sign their names. - Another person signs on the testator's behalf. If the testator is unable to sign and directs another person to sign on their behalf, the signature must be made by the other person in the testator's presence and at the testator's direction, with two witnesses present who must sign their names.
For an ordinary signed will, the testator's signature alone is sufficient. The will is valid the moment the testator finishes signing, with no witnesses required.
Why witnesses still matter at probate
While witnesses are not required at execution, they become important at probate. Under 20 Pa.C.S. § 3132, the will must be proved at probate by two competent witnesses. The witnesses do not need to have been present at execution. They typically prove the will by:
- Authenticating the testator's signature. Two people who knew the testator and recognize the testator's handwriting can authenticate the signature. - Testifying about execution. If the will was witnessed at execution (even though not required), those witnesses can testify. - Providing other evidence of authenticity. Expert handwriting analysis can substitute when witnesses are unavailable.
The practical effect: Pennsylvania does not require witnesses at execution, but witnesses are necessary at probate. Most Pennsylvania attorneys therefore have wills witnessed at execution as a matter of practice, even though the law does not require it. Witnessed wills are easier to prove at probate, and the witnesses can later authenticate the testator's signature.
What this means in practice
The rule produces specific scenarios:
- A handwritten signed will is valid in Pennsylvania. Because witnesses are not required at execution, a will entirely in the testator's handwriting and signed at the end is valid — Pennsylvania effectively accepts what other states call a holographic will, but without that label. - A typed will signed without witnesses is valid in Pennsylvania. This is unusual nationally. Most states would reject such a will; Pennsylvania accepts it. - A will written and signed in another state may have different status in Pennsylvania than in the state of execution. A will validly executed under Pennsylvania law (signed by testator at the end) may not be valid in another state if that other state requires witnesses. A will not valid under another state's law (because witnesses were missing) may still be valid in Pennsylvania. - Probate complications without witnesses at execution. If a will is signed without witnesses, the executor must find two witnesses at probate to authenticate the signature — typically people who knew the testator and recognize the handwriting. This can be difficult years or decades later.
Pennsylvania's flexibility on execution is a real benefit for testators who need to make a will quickly or without access to witnesses. The trade-off is that probate is more complex when execution witnesses are unavailable.
What you can do about it
For a reliable Pennsylvania will:
- Sign the will at the end. A signature anywhere other than the end may be challenged. - Have two witnesses sign at execution even though not legally required. Witnessed wills are easier to prove at probate. - Add a self-proving will affidavit under 20 Pa.C.S. § 3132.1. A self-proving will signed before a notary at execution can be admitted to probate without requiring witnesses to authenticate the signature later. - For an existing unwitnessed will, have witnesses authenticate the testator's signature now (rather than waiting for probate). Documentation of the signature's authenticity created during the testator's lifetime is more reliable than reconstructing authenticity after death. - For a will signed by mark or on behalf of the testator, ensure two witnesses are present at execution as required.
Who this affects most
Pennsylvania's flexible execution rule is most relevant for:
- Pennsylvanians who write a handwritten signed will and want to know whether it is valid (it is, as long as signed at the end) - Estates where the testator signed a will without witnesses — probate is still possible but more complex - Out-of-state residents whose wills were rejected under their state's witness requirements but who later become Pennsylvania domiciliaries — the will may now be valid under Pennsylvania law - Pennsylvania estate planners who must counsel clients on the disconnect between execution requirements (no witnesses) and probate requirements (two witnesses)
Pennsylvania's rule is a quiet outlier. The state's flexibility at execution is balanced by strictness at probate, and the practical effect is that most Pennsylvania wills are witnessed despite the absence of a legal requirement.