noun which may take the genitive case particle 'no'
undeclared; unreported
Used in official or administrative contexts for something that has not been declared or reported, such as income, assets, or items at customs.
If you have undeclared income, the tax office may point it out.
Undeclared items were found at customs.
Compound of 未 (mi, 'not yet') and 申告 (shinkoku, 'declaration, report').