Which of the following is NOT a type of evidence?

Account evidence is not recognized as a formal classification of evidence within legal contexts. The categories of evidence typically recognized include direct evidence, circumstantial evidence, and testimonial evidence.

Direct evidence provides direct proof of a fact, such as eyewitness accounts or video footage showing an event occurring. Circumstantial evidence, on the other hand, relies on an inference to connect it to a conclusion of fact, meaning it suggests a fact but does not directly prove it. Testimonial evidence is comprised of statements made under oath by witnesses, recounting what they have seen or heard related to the case.

Since "account evidence" does not fit into these established categories, it accurately represents an option that is not a recognized type of evidence in investigative or legal studies.