The legal term for innocent misrepresentation is "scienter."

Innocent Misrepresentation

a false statement made without knowledge of its falsity, but not intended to deceive, which may allow for some remedies if it leads another party to enter into a contract under false pretenses.

Scienter

In cases of fraud and deceit, the word means knowledge on the part of the person making the representations, at the time when they are made, that they are false. In an action for deceit, scienter must be proved.