The Coalition NZ Party, led by Hannah Tamaki, cannot register as a political party.
The Electoral Commission has ruled that the name and logo of the party was likely to mislead or confuse voters.
"The word coalition has a specific meaning in elections and politics and means a grouping or alliance of multiple parties. Under MMP, governments are usually coalitions and it is common to refer to governments as 'the coalition'," a spokesperson for the commission said.
"The commission decided the name Coalition New Zealand could confuse voters, lead them to think they are voting for a grouping of other parties, or that they are voting for a party associated with the government of the day.