不正 ふせい利用 りよう検知 けんちじゃありませんでした
fuseiriyōkenchijārimasendeshita

Noun
Desu Copula

The polite, past negative form of 不正利用検知

1. Was not improper use detection.; Was not detecting improper use.

Past/Perfective
Negative
Polite
Terminal Form