Which of the following situations disqualifies a notary from performing a notarial act?

In the context of notary practice, a notary must maintain impartiality and avoid conflicts of interest to ensure the integrity of the notarial act. When a notary is a signer of the document being notarized, this raises a significant conflict of interest. The notary's role is to act as an impartial witness to the signing of documents; if they are also a party to the document, their ability to serve this role is compromised. This situation undermines the neutrality expected from a notary and could lead to questions of validity regarding the notarization.

In contrast, having a relative as a signer may not automatically disqualify the notary, depending on specific state laws about familial relationships and impartiality. Charging a fee for services rendered is generally permissible as long as the fee is within legal limits and disclosed. Lastly, the requirement for a signature in notarization practices varies but does not inherently disqualify a notary unless it specifically contravenes statutory requirements or procedures. Thus, being a signer makes it impossible for the notary to fulfill their objective role, clearly disqualifying them from executing a notarization.