If you’re signing legal documents, you’re likely to be wondering if you need a witness or a notary. They both play important roles, but are different. By understanding which one you require, you can steer clear of errors and delays.
A witness signature confirms the person witnessed the signing of a document or acknowledged their signature. A notary signature is the signature of a notary who performs an official act.
What Is a Witness Signature?
A witness signature is provided by someone who watches another person sign a document. This process, called witnessing of signatures, is common for wills, contracts, and certain legal agreements.

When Do You Need a Witness?
You may need a witness for:
- Wills and estate planning documents.
- Certain powers of attorney.
- Property contract and agreement.
- Contractual documents and official documents.
Be sure to read the directions on the document as some don’t need a witness.
What Is a Notary Signature?
A notary signature comes from a notary public who performs an authorized notarial act. The notary may verify the signers’ identity, ensure the signers are signing voluntarily, or even take an oath.
For instance, an affidavit could have to be sworn or affirmed in front of a notary or other competent person. This process cannot simply be substituted by an ordinary witness.
Witness Signature vs. Notary Signature
| Feature | Witness | Notary |
| Main role | Observes the signing | Performs an official notarial act |
| Identity check | Depends on the document | Generally required |
| Common uses | Wills and contracts | Affidavits and legal forms |
| Official seal | Usually unnecessary | Often required |
If a document requires both, you must follow the requirements for each.
Who Can Witness a Signature on a Legal Document?
Wondering who can witness a signature on a legal document? An eligible adult can be a witness in many instances. But there are some documents that need an independent person, not benefiting from the agreement. Please read the age and eligibility criteria and make sure they are the right person before selecting.
Who Can Witness a Power of Attorney?
If you ask, who can witness a power of attorney, please look into your state’s requirements and documents. Some powers of attorney must be witnessed and or notarized. Not all of a friend or family member might fit the bill.
How Many Witnesses Are Needed for a Will?
Typically, two witnesses are required for a regular written will in most U.S. states. The rules are different, however, and in some states the beneficiaries are not allowed to be witnesses. Prior to signing, please refer to the applicable law.
What Are the Witness Signature Rules by State?
Witness signature rules vary by state and document type. They may cover the number of witnesses, who qualifies, and whether they must observe the signing.
Notary witness requirements by state also differ. Check official state guidance if you are unsure whether a notary can also act as a witness.
What Is an Affidavit Witness Signature?
There is a potential for an affidavit witness signature to be mistaken for notarization. An affidavit is a written statement of which the parties declare that they swear or affirm is true. Numerous affidavits need to be filled out before a notary public or someone else who has the authority to administer oaths.
Ensure that the affidavit is filled out according to the instructions of the receiving court or organization.

Can a Document Have Both Signatures?
Yes. Documents will need a witness and notary for some documents. The witness here witnesses the signing and the notary performs the notary act in compliance with the requirements. Please read the instructions before signing to make sure you are required to be able to fulfill both requirements.
Conclusion
A witness signature means that someone witnessed a signing, a notary signature means that it was a notarial act. They’re used for different purposes and so it is important to look at your document’s requirements before signing.
Frequently Asked Questions
What is a witness signature?
A witness signature confirms that someone observed another person signing a document or acknowledging their signature. The witness may later be asked to confirm what happened. Requirements depend on the document and applicable law.
Can a witness replace a notary?
Not when notarization is specifically required. A witness observes the signing, while a notary performs an authorized notarial act. Check the document instructions before signing.
Who can witness a legal document?
An eligible adult can witness many documents, but some require an independent person. Check the document’s eligibility rules before choosing a witness.
Who can witness a power of attorney?
Requirements depend on the document and jurisdiction. Some powers of attorney require witnesses, notarization, or both. Check the rules before signing.
How many witnesses are needed for a will?
Many U.S. states generally require two witnesses for a standard written will. Requirements vary, so check the applicable state law.
Does an affidavit need a notary?
Many affidavits must be sworn or affirmed before a notary or another authorized official. An ordinary witness may not meet this requirement.
Can a family member witness a signature?
Sometimes. However, restrictions may apply if the family member benefits from a will or agreement. Check the applicable rules first.
Can a notary also be a witness?
It depends on the jurisdiction and document. Check the applicable rules before asking one person to perform both roles.
What if a witness forgets to sign?
A missing signature may cause delays or require another signing. The correct solution depends on the document and applicable law.
Are witness rules the same in every state?
No. States differ in witness eligibility, signature requirements, and notarization rules. Check official state guidance before signing.