帳ちょう簿ぼ外がい

noun which may take the genitive case particle 'no'

off-book; off-the-books

Describes transactions, assets, or activities not recorded in official accounts; often implies informal or hidden dealings.

• その会かい社しゃは帳ちょう簿ぼ外がいの取とり引ひきをしていた。

  The company was conducting off-the-books transactions.

• 帳ちょう簿ぼ外がいの資し産さんが発はっ覚かくした。

  Off-book assets were uncovered.