Only if the Notary is uncertain of a signer's identity, willingness or general competence, or has a good reason to suspect fraud. Notaries should not refuse to serve anyone because of race, religion, nationality, lifestyle, or because the person is not a client or customer. However, there are circumstances where a Notary Public can, or must, refuse service:
The signer asks for legal advice prior to executing documents.
The Notary suspects the signer is being pressured, coerced, or threatened by another person to execute the documents being signed.
The signer requests notary services before or after regular hours.
The prospective customer is unreasonable.