Chetwin is presenting the petition to the Minister of Commerce and Consumer Affairs today.
"Retailers shouldn't be able to dupe consumers by displaying only part of the cost," Chetwin said.
The process of adding fees to the advertised price was known as "drip pricing" and Chetwin said companies often used it to make consumers less likely to shop around.
In its report, Consumer NZ highlighted examples of this from companies including online florists, sports event promoters, theatres, accommodation providers and car dealers.
The report found 68 per cent of consumers surveyed agreed that retailers should be required to disclose the total price in advertising.