noun, noun or participle which takes 'suru'
unauthorized use; misuse
Refers to using something without permission or in a way that violates rules, often in legal, technical, or formal contexts.
会社のクレジットカードの不正使用が発覚した。
Unauthorized use of the company credit card was discovered.
システムの不正
Please change your password regularly to prevent misuse of the system.