Ik heb nooit geen geld.
English: I never have any money.
In Dutch, 'dubbele ontkenning' means using two negative words in the same sentence to express a negative meaning, often for emphasis or in certain fixed expressions.
Double negation is mainly used in Dutch in old-fashioned, poetic, or fixed expressions, and sometimes for emphasis. In most modern Dutch, only one negation is used, but you may see double negation in literature, songs, or regional speech.
Ik heb nooit geen geld.
English: I never have any money.
Zij zegt niets niet.
English: She doesn't say nothing (She says nothing at all).
Niemand kan dat niet doen.
English: Nobody can't do that (Everyone can do that).
Dat is niet geen probleem.
English: That is not no problem (That is a problem).