Which of the following is true about a notary public's responsibilities?

A notary public's responsibilities fundamentally include acting as an impartial witness to the signing of important documents and ensuring the integrity of the notarial acts they perform. This impartiality is crucial because it helps to uphold the trust and reliability of the notary's role in verifying identities and ensuring that signers understand the documents they are signing.

Acting without bias means that notaries must not have any personal interest in the transaction and should provide services equally to all individuals who seek their notarial services. This principle helps maintain the ethical standards and public confidence in notarial acts.

The other options present misunderstandings of a notary's duties. For instance, notaries do not have the authority to certify all types of documents; their certification is limited to specific types of documents allowed under state law. Notaries also are not required to perform acts if there are conditions or circumstances that could compromise the integrity of the act or the capacity of the signer. Additionally, notaries do not typically need to ensure that signers are from the same state, as long as the notarization complies with the laws of the state in which the notary is commissioned.