"The employee's financial management was fraudulent" "It was a fraudulent transaction" "The accountant was convicted of fraud" "He had acted fraudulently" "The whole operation was a fraud" "The accountant was nothing more than a fraudster" The adjective is "fraudulent". I have never seen "fraudful" used and I don't think it's a word.

Hi Samad: I am not familiar with "fraudful". It may be a word, but fraudulent is commonly used, and will suffice. A person can be fraudulent and the behavior can be fraudulent. A document can be fraudulent.