Many shoppers at ALDI are confused about a virtually unknown rule that was shared on Facebook.

Over the last week, several shoppers have shared their confusion over ALDI's refusal to allow shoppers to purchase alcohol if they have a minor with them.

ALDI policy states that a customer can be denied the sale of alcohol if a child under the age of 18 is accompanying them or if a minor has handled alcohol they intend to buy.

One shopper was unaware of the rule and claimed he was stopped from purchasing Vodka Cruisers for his wife as he had his teenage daughters with him.

Another shopper said the same thing happened to her, as she was refused service after her 18-month-old toddler touched a bottle at the checkout.

“I did and had my 18-month-old daughter with me,” said the shopper.

“I was holding her on my hip and she leant over and touched the alcohol on the conveyer while I was loading other groceries on.”

Another claimed she was denied service in the presence of her underage son.

“I was refused because I was buying a carton and had my son carry it because I have a bad back,” the shopper said.

The German supermarket has confirmed with 7News that the policy of the supermarket is in line with Australian laws.

“As a responsible retailer, ALDI Australia supports and adheres to all regulations for the purchase of alcohol including Responsible Service of Alcohol (RSA),” said an ALDI Australia spokesperson.

“Under the Liquor Control Reform Act 1998, it is an offence to supply alcohol to a person under the age of 18 and for a person under the age of 18 to purchase or receive alcohol.

“The sale of alcohol can be refused if a minor has handled alcohol that could be potentially purchased by an adult for the minor’s consumption.

“This also extends to a minor accompanying an adult purchasing alcohol, even if the minor has not physically touched an alcoholic product.

“It is the store’s responsibility to refuse any customer who presents a risk and ultimately it is at the discretion of the person serving alcohol to decline the sale should they have any doubts or concerns.

“There are severe consequences for breaching laws and policies set in place by the Australian government involving the sale of alcohol.

“As such, ALDI faces heavy penalties should we sell alcohol to any customer who supplied to a person under the age of 18.”