The New Zealand National Party has been reprimanded by the Advertising Standards Authority for a campaign claim it deemed misleading. The watchdog warned the party that factual information must be substantiated, following an investigation into its assertion about Labour's capital gains tax policy. The claim, which was part of a broader campaign strategy, was found to lack sufficient evidence to support its assertions. The National Party has been urged to ensure all future advertising aligns with factual accuracy. The incident highlights ongoing tensions between major political parties over policy claims and their public presentation. The Advertising Standards Authority emphasized the importance of transparency in political advertising, particularly regarding tax-related issues. This ruling could influence future campaign strategies as parties navigate the fine line between persuasive messaging and factual integrity.