打診 だしん発生 はっせい げん認証 にんしょうではありません
dashinhasseigennin shōdewārimasen

Noun
Desu Copula
Negation Auxiliary

The polite negative form of 打診発生源認証

1. Not a source authentication proposal.; Not an inquiry about the origin of a proposal.

Negative
Polite
Formal Register
Computing