Unless a writing requires a subscribing witness for its validity, it may be proved as if there was no subscribing witness.
§ 4537.Proof of writing subscribed by witness
Article 45. Evidence · Last amended 1963 · Last verified July 21, 2026
In one sentenceCPLR 4537 permits a party to prove a writing without calling its subscribing witness, unless that witness's signature is required by law for the document to be valid.
Full Text of CPLR 4537
Plain-English Summary
Some documents traditionally needed a subscribing witness, someone who watched the signing and added their own signature to attest to it. Older practice sometimes required that witness to testify before the document could go into evidence, even when nothing about the document's validity turned on the witness's presence.
CPLR 4537 cuts that requirement down to size. If the law does not require a subscribing witness for the writing to be valid in the first place, a party can prove the document through any other competent method, such as testimony from someone who saw it signed or admissions by the signer, without hunting down and calling the subscribing witness.
The rule matters most for older instruments like bonds or deeds that carry a witness signature out of custom rather than legal necessity. It saves parties from tracking down a witness who may be unavailable, deceased, or forgotten, when the witness's testimony was never a condition of the document's validity to begin with.
Frequently Asked Questions
When does a writing require a subscribing witness for validity?
New York law requires a subscribing witness for a narrow set of instruments; for most contracts and other documents, no witness signature is legally required.
What happens if the subscribing witness is unavailable?
Under CPLR 4537, if the witness's signature was not legally required for the document's validity, the document can be proven through other evidence instead.
Can a will still require its subscribing witnesses to testify?
Wills fall under separate execution requirements, and CPLR 4537 does not remove witness requirements that the law imposes for a document's validity.
What kind of evidence can substitute for a subscribing witness's testimony?
A party can rely on testimony from anyone who observed the signing, admissions by the person who signed, or other proof of authenticity permitted under the article.
Does CPLR 4537 apply to deeds and bonds?
It applies to any writing carrying a subscribing witness signature that the law does not require for validity, which includes many older-style deeds and bonds.
Advisory Committee Notes
This rule is a restatement of former § 331.
Amendment History
Formerly § 4537, add, L 1962, ch 308; amd, L 1962, ch 315, § 1, eff Sept 1, 1963.
Source & verification. Provision text, History, and Advisory
Committee Notes are reproduced verbatim from the Consolidated Laws of New York.
Last verified July 21, 2026.
· Official source
Also known as: subscribing witness not required New Yorkproving a document without its witnesswitnessed document evidence CPLRNew York proof of a deed without witness testimony