Which of the following is a requirement for notarizations performed in Illinois?

A fundamental requirement for notarizations in Illinois is ensuring that the signer is doing so voluntarily. This is crucial because the integrity of the notarization process hinges on the notion of consent. A notary must confirm that the individual signing the document is not under duress or coercion, as this helps to ensure the validity of the transaction. By safeguarding the signer's free will, notaries contribute to the legal and ethical standards expected in the signing process.

The other options present various responsibilities and practices related to notarization, but they do not represent a core requirement in the same way. For instance, while it is recommended for notaries to maintain a journal of their activities, it is not an absolute requirement in Illinois. Similarly, charging fees is customary but not mandatory, and prior acquaintance with the signer is not a stipulation for valid notarization. Thus, confirming the signer’s voluntary participation is a critical aspect of maintaining the legitimacy of the notarization process.