Which of the following three defects would render an official certificate by a notary public invalid? 1. The term of the notary was expired at the time of issuing the notarial certificate. 2. The name of the notary is misspelled on his identification card. 3. The notary failed to file his official oath.

Notary exams focus on five key notarial acts: acknowledgements, jurats, oaths/affirmations, copy certifications, and protests.