A furious Woolworths customer has been slammed online after they compared a standard store policy to the Holocaust.

The customer ranted on the supermarket's Facebook page to complain after a worker had called the store manager to approve $1,300 worth of gift cards being purchased.

The woman visited the supermarket in Leura with her husband to purchase the vouchers for his clients when they were questioned by the staff.

“We told her it was none of her business at first then told her the reason. She told us it was due to some scam, what scam I’m paying for the cards to give as gifts as part of promoting the business!” the woman wrote.

“Last time we checked we live in a democracy but it appears communists run Woolworths,” she added.

“The lady said she was just doing her job just what the Germans said during the Holocaust.”

The post has been slammed by hundreds, with many calling the woman "disgusting" for the "offensive" comparison.

“How dare you compare this situation to the holocaust!!! “ one woman wrote, adding, “the staff were looking out FOR YOU, in case YOU were being scammed.”

“Did you really just compare information sharing at the point of sale to the holocaust?! Yikes,” another customer said.

A Woolworths spokesperson confirmed to 7NEWS.com.au that the policy was introduced after the Australian Competition and Consumer Commission raised concerns about scammers targeting individuals with demands for payments via gift cards.

“As a responsible retailer, we want to play our part in reducing harm to consumers from scams,” the spokeswoman said.